Games like SENTRY on Steam
For those who prefer not to search, lists of the most played, top deals and best free games like SENTRY are available at the bottom of the page.
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Sanctum 2
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game. Pick from four unique character classes and embark on a mission to protect the oxygen-producing Cores from hordes of deadly aliens who are threatened by their existence.
Sanctum
You think Tower Defense games are all about building? You thought wrong. Sanctum is not your average Tower Defense title. When the havoc starts, you get to join the fray! As one of the world’s first First Person Shooter - Tower Defense games, Sanctum has taken the best of both worlds to deliver an epic, one-of-a-kind experience.
Anomaly Warzone Earth Mobile Campaign
Anomaly Warzone Earth Mobile Campaign continues Steam's Anomaly Warzone Earth in an extra 15-level campaign. Originally released on mobile devices, the campaign is brought to Steam for PC, Mac and Linux exclusively in Anomaly Bundle. AWE Mobile Campaign turns tower defense on its head.
Anomaly Korea
Exclusively brought to Steam for PC, Mac and Linux in Anomaly Bundle, Anomaly Korea is an expansion campaign to Anomaly Warzone Earth. The alien robots are back and this time they’ve got Korea in their sights. It’s your job to lead a squad into fierce fire-fights and fend off the alien invasion.
Anomaly Defenders
Anomaly Defenders is the closing installment of the Anomaly series. The original incarnation of the Tower Offense sub-genre had players controlling humans fighting alien invaders. Now, the tables have turned. The human counterattack is underway and the alien homeworld is under threat.
Alien Shooter TD
Innovative Tower Defense inspired by legendary Alien Shooter series! The game was created in keeping with the best traditions of Sigma`s games, no concessions of any kind - everything is just like in real life!
Unstoppable Gorg
Defend the solar system from fearsome aliens by sending satellites into orbit in revolutionary tower defense action!
Space Run
Space Run is a «real-time spaceship construction strategy game». Space Run takes the well-known Tower Defense-style gameplay and twists it, challenging you to manage and protect a spaceship and its cargo against the hazards of deep space!
Anomaly 2
Anomaly 2 is a sequel to the critically acclaimed Anomaly Warzone Earth. Maintaining the core elements of the original, Anomaly 2 adds plenty of new features: unit morphing, over million tactical combinations, post-apo world and tower defense vs tower offense multiplayer mode.
No Creeps Were Harmed TD
Employ lethal turrets, traps, and gadgets to defend against an onslaught of evolving creeps! Step into a twisted, hyper 3D, mind bending realm. Upgrade and adapt your defenses. Become a master maze crafter. Collect bizarre artifacts. Rush creeps for lucrative rewards, and succumb to greed!
Kunitsu-Gami: Path of the Goddess
A new tale of the Kami awaits... Kunitsu-Gami: Path of the Goddess is a unique Japanese-inspired, single player Kagura Action Strategy game.
The Riftbreaker
The Riftbreaker™ is a base-building, survival game with Action-RPG elements. You are an elite scientist/commando inside an advanced Mecha-Suit capable of dimensional rift travel. Hack & slash countless enemies. Build up your base, collect samples and research new inventions to survive.
Infested Planet
Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.
2112TD: Tower Defense Survival
Get ready for the ULTIMATE tower defense onslaught. Build, deploy, research and upgrade your defenses in this epic, old school RTS inspired sci-fi adventure.
Anomaly: Warzone Earth
Lead an armored squad through the perils of this reversed tower defense action-strategy game!
Space Run Galaxy
Space Run Galaxy is the sequel to Space Run, the game from one-man studio Passtech, which seduced hundreds of thousands of players with its dynamic and original gameplay. By twisting the tower-defense game style, Space Run offered an addictive real-time spaceship construction strategy experience.
Revenge of the Titans
The ultimate mash-up of Real-time Strategy and Tower Defense!
Grim Nights
Your village must survive for 13 days! Gather resources, expand, explore the underground for riches, and train soldiers to defend against hordes of the undead.
Out of Ammo
Out of Ammo is an intense VR Tower Defense / FPS hybrid strategy game that will have you constructing defenses, calling in artillery, issuing orders, and taking direct control of your soldiers in order to survive a relentless enemy onslaught.
Nuclear Dawn
Explore war-torn post-apocalyptic landscapes and take fight against enemies using various weapons in this FPS/RTS hybrid.
Fieldrunners 2
Get ready to DEFEND THE WORLD! The biggest sequel in tower defense history is finally here: Fieldrunners 2 has arrived! From Subatomic Studios, creators of the award winning classic strategy game comes an all new adventure that was years in the making.
CARNAGE OFFERING Tower Defense
The replicator robots are back! It's 2528. The machines are increasingly infecting the planets with genetically modified monsters. Challenge them and try to stop the onslaught. Upgrade buildings and heroes, mine resources, discover technology and fight to save humanity!
Shortest Trip to Earth
Shortest Trip to Earth is a roguelike spaceship simulator focused on exploration, ship management and tactical battles. Embark on a perilous journey across the universe with nuclear missiles, armed crew and a cat.
Taur
Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?
Most played games like SENTRY on Steam
Take a look at the top games like SENTRY that are currently attracting the largest player bases on the Steam platform, as of June 16th 2025.
1. Half-Life 2
Similarity 41% Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat. Half-Life 2 is a fps, action and sci-fi game developed and published by Valve. Released on November 16th 2004 has received 245,627 reviews of which 239,721 were positive and 5,906 were negative resulting in an impressive rating of 9.7 out of 10. The game has hit the top spot as the #1 most played game like SENTRY, thanks to its 1,626 peak concurrent players over the last day.
9.7
239,721
5,906
1,626
players
2. Black Mesa
Similarity 42% Relive Half-Life. Black Mesa is a fps, remake and action game developed and published by Crowbar Collective. Released on March 06th 2020 has received 127,693 reviews of which 121,562 were positive and 6,131 were negative resulting in an impressive rating of 9.4 out of 10. While seeing 897 players online at once in the last 24 hours, this game is currently ranked #2 among games like SENTRY based on player count.
9.4
121,562
6,131
897
players
3. Surviving Mars
Similarity 42% There will be challenges to overcome. Execute your strategy and improve your colony’s chances of survival while unlocking the mysteries of this alien world. Are you ready? Mars is waiting for you. Surviving Mars is a colony sim, city builder and strategy game developed by Haemimont Games and Abstraction and published by Paradox Interactive. Released on March 15th 2018 has received 26,570 reviews of which 22,472 were positive and 4,098 were negative resulting in a rating of 8.3 out of 10. While seeing 631 players online at once in the last 24 hours, this game is currently ranked #3 among games like SENTRY based on player count.
8.3
22,472
4,098
631
players
4. Orcs Must Die! Deathtrap
Similarity 41% Orcs Must Die! Deathtrap combines chaotic third-person combat with devious trap-laying strategy. Enjoy endless replayability as your War Mage grows stronger through roguelite progression. Repel relentless orc hordes solo or with up to 4 players. Orcs Must Die! Deathtrap is a tower defense, third-person shooter and co-op game developed and published by Robot Entertainment. Released on January 28th 2025 has received 3,338 reviews of which 2,388 were positive and 950 were negative resulting in a rating of 7.0 out of 10. With 535 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like SENTRY.
7.0
2,388
950
535
players
5. The Perfect Tower II
Similarity 41% The Perfect Tower II is a mix between an incremental and a tower defense game. Build a town, manage resources and explore a variety of mini-games and tons of upgrades. Fully automate your game and watch numbers going up! The Perfect Tower II is a strategy, idler and tower defense game developed and published by Fire Sword Studios. Released on February 26th 2021 has received 3,639 reviews of which 3,201 were positive and 438 were negative resulting in a rating of 8.5 out of 10. With 526 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like SENTRY.
8.5
3,201
438
526
players
6. Aliens: Dark Descent
Similarity 40% Drop into the gripping journey of Aliens: Dark Descent, a squad-based, single-player action game in the iconic Alien franchise. Lead your soldiers in real-time to stop a new and terrifying kind of Xenomorph outbreak on Planet Lethe. Aliens: Dark Descent is a strategy, action and tactical game developed by Tindalos Interactive and published by Focus Entertainment. Released on June 19th 2023 has received 15,650 reviews of which 13,803 were positive and 1,847 were negative resulting in a rating of 8.6 out of 10. With 391 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like SENTRY.
8.6
13,803
1,847
391
players
7. Thronefall
Similarity 47% A minimalist game about building and defending your little kingdom. Thronefall is a tower defense, strategy and city builder game developed and published by GrizzlyGames. Released on October 11th 2024 has received 20,544 reviews of which 19,846 were positive and 698 were negative resulting in an impressive rating of 9.4 out of 10. With 289 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like SENTRY.
9.4
19,846
698
289
players
8. Bloons TD Battles
Similarity 40% Go head to head with other players in a Bloon-popping battle for victory. From the creators of best-selling Bloons TD 5, this all new Battles game is specially designed for multiplayer combat, featuring the ability to control bloons directly and send them charging past your opponent's defenses. Bloons TD Battles is a free to play, tower defense and multiplayer game developed and published by Ninja Kiwi. Released on April 20th 2016 has received 29,096 reviews of which 26,414 were positive and 2,682 were negative resulting in a rating of 8.9 out of 10. With 275 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like SENTRY.
8.9
26,414
2,682
275
players
9. Bloons Monkey City
Similarity 44% Create, upgrade, and customize your very own Bloons Monkey City in this groundbreaking blend of city building and tower defense awesomeness! Bloons Monkey City is a free to play, strategy and action game developed and published by Ninja Kiwi. Released on April 10th 2020 has received 6,222 reviews of which 5,676 were positive and 546 were negative resulting in a rating of 8.8 out of 10. With 272 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like SENTRY.
8.8
5,676
546
272
players
10. The Riftbreaker
Similarity 55% The Riftbreaker™ is a base-building, survival game with Action-RPG elements. You are an elite scientist/commando inside an advanced Mecha-Suit capable of dimensional rift travel. Hack & slash countless enemies. Build up your base, collect samples and research new inventions to survive. The Riftbreaker is a base-building, tower defense and survival game developed by and published by Exor Studios and Surefire.Games. Released on October 14th 2021 has received 18,005 reviews of which 16,245 were positive and 1,760 were negative resulting in a rating of 8.8 out of 10. With 215 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like SENTRY.
8.8
16,245
1,760
215
players
Best deals on games like SENTRY on Steam
Discover fantastic savings with the best discounts on a variety of games like SENTRY available on Steam right now, updated on June 16th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like SENTRY.
1. HERO DEFENSE
Similarity 45% CREEPS CRUMBLE. HEROES RISE. Command a team of renegade heroes and impale, slash, tear and burn through legions of undead hell-bent on world domination. Your mission: to defeat the world’s most powerful vampire, Count Necrosis. HERO DEFENSE is a tower defense, strategy and indie game developed by Happy Tuesday and published by Headup. Released on May 31st 2016 has received 747 reviews of which 471 were positive and 276 were negative resulting in a rating of 6.1 out of 10. Featuring a massive 99% discount, this game currently holds the #1 spot in the best deals for games like SENTRY.
6.1
471
276
-99%
29.99€
0.56€
2. Overload
Similarity 42% A new six-degree-of-freedom shooter with intuitive controls, amazing lighting and graphics. From the creators of Descent, Overload is the best zero-gravity robot-blasting combat ever. Overload is a action, 6dof and fps game developed and published by Revival Productions and LLC. Released on May 31st 2018 has received 2,022 reviews of which 1,903 were positive and 119 were negative resulting in a rating of 9.0 out of 10. Thanks to its incredible 98% discount, this game is now the #2 best deal in games like SENTRY.
9.0
1,903
119
-98%
24.99€
0.59€
3. X-Morph: Defense
Similarity 51% Unique fusion of a top-down shooter and tower defense strategy. You are the invader! Use destructive weapons or lead your enemies into a maze of towers. Strategize in the build mode by carefully selecting various types of alien towers or throw yourself right into the heat of the battle. X-Morph: Defense is a tower defense, strategy and action game developed by and published by Exor Studios. Released on August 30th 2017 has received 3,823 reviews of which 3,506 were positive and 317 were negative resulting in a rating of 8.8 out of 10. Thanks to its incredible 98% discount, this game is now the #3 best deal in games like SENTRY.
8.8
3,506
317
-98%
19.99€
0.54€
4. Battlezone 98 Redux
Similarity 44% One of the greatest sci-fi strategy games of all time returns with remastered visuals, online multiplayer and near unlimited mod content from Steam Workshop. Experience thrilling first person action and acclaimed RTS in this explosive alternate vision of the 1960s space race. Battlezone 98 Redux is a strategy, action and first-person game developed by Big Boat Interactive and published by Rebellion. Released on April 18th 2016 has received 1,064 reviews of which 975 were positive and 89 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 98% discount, this title has earned the #4 position in the best deals for games like SENTRY.
8.7
975
89
-98%
19.99€
0.58€
5. DG2: Defense Grid 2
Similarity 51% Setting the bar as the definitive tower defense game, Defense Grid 2 introduces new worlds and threats to test your tower placement strategies. With a bold new look and the addition of new game modes, player-versus-player and multiplayer co-op, every play brings fun new opportunities and challenges. DG2: Defense Grid 2 is a strategy, tower defense and indie game developed by Hidden Path Entertainment and published by Hidden Path Entertainment and 505 Games. Released on September 23rd 2014 has received 3,163 reviews of which 2,723 were positive and 440 were negative resulting in a rating of 8.3 out of 10. Currently offered at a significant 98% discount, this title has earned the #5 position in the best deals for games like SENTRY.
8.3
2,723
440
-98%
12.49€
0.26€
6. Deathtrap
Similarity 44% Deathtrap is a Tower Defense game with strong action-RPG elements, a game of vicious tricks, killing machines, rotating blades and splattering blood. Deathtrap is a tower defense, rpg and action game developed and published by NeocoreGames. Released on February 04th 2015 has received 2,194 reviews of which 1,842 were positive and 352 were negative resulting in a rating of 8.1 out of 10. Currently offered at a significant 98% discount, this title has earned the #6 position in the best deals for games like SENTRY.
8.1
1,842
352
-98%
19.99€
0.49€
7. Tin Can
Similarity 43% You've barely managed to escape your exploding spaceship. Now in an old escape pod, you hurtle through space at the mercy of the cosmos. With no knowledge of the pod’s complex systems, your life depends on a technical manual and your own wits. How long can you survive? Tin Can is a simulation, space and survival game developed by Tin Can Studio and published by Tin Can Studio and IndieArk. Released on May 12th 2022 has received 1,198 reviews of which 1,015 were positive and 183 were negative resulting in a rating of 8.1 out of 10. Currently offered at a significant 98% discount, this title has earned the #7 position in the best deals for games like SENTRY.
8.1
1,015
183
-98%
17.99€
0.46€
8. Shortest Trip to Earth
Similarity 52% Shortest Trip to Earth is a roguelike spaceship simulator focused on exploration, ship management and tactical battles. Embark on a perilous journey across the universe with nuclear missiles, armed crew and a cat. Shortest Trip to Earth is a rogue-lite, space and strategy game developed and published by Interactive Fate. Released on August 15th 2019 has received 1,390 reviews of which 1,072 were positive and 318 were negative resulting in a rating of 7.4 out of 10. Currently offered at a significant 98% discount, this title has earned the #8 position in the best deals for games like SENTRY.
7.4
1,072
318
-98%
25.13€
0.53€
9. Alien Rage - Unlimited
Similarity 43% Unleash a fury of powerful weapons as you blast your way through armies of Alien forces hell-bent on taking you down! Battle through 14 intense levels and prepare to face a barrage of beastly-sized bosses that will test your every skill. Each of your 10 weapons comes with two firing modes and you’ll need all of them! Alien Rage - Unlimited is a action, shooter and fps game developed and published by CI Games. Released on September 24th 2013 has received 3,455 reviews of which 2,334 were positive and 1,121 were negative resulting in a rating of 6.6 out of 10. Currently offered at a significant 98% discount, this title has earned the #9 position in the best deals for games like SENTRY.
6.6
2,334
1,121
-98%
19.99€
0.54€
10. Syndrome
Similarity 41% Syndrome, a sci-fi survival horror game that places you in a living hell inside a doomed starship. Find out what happened to your lost crew. Run. Hide. Fight. Survive. Syndrome is a horror, fps and survival horror game developed by Camel 101 and published by Camel 101 and WhisperGames. Released on October 06th 2016 has received 344 reviews of which 221 were positive and 123 were negative resulting in a rating of 6.2 out of 10. Currently offered at a significant 98% discount, this title has earned the #10 position in the best deals for games like SENTRY.
6.2
221
123
-98%
19.99€
0.51€
Free games like SENTRY on Steam
Check out this fantastic list of free-to-play games like SENTRY you can enjoy on Steam right now, updated on June 16th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play games like SENTRY.
1. The Perfect Tower II
Similarity 41% The Perfect Tower II is a mix between an incremental and a tower defense game. Build a town, manage resources and explore a variety of mini-games and tons of upgrades. Fully automate your game and watch numbers going up! The Perfect Tower II is a strategy, idler and tower defense game developed and published by Fire Sword Studios. Released on February 26th 2021 has received 3,639 reviews of which 3,201 were positive and 438 were negative resulting in a rating of 8.5 out of 10. With 526 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like SENTRY.
8.5
3,201
438
526
players
2. Bloons TD Battles
Similarity 40% Go head to head with other players in a Bloon-popping battle for victory. From the creators of best-selling Bloons TD 5, this all new Battles game is specially designed for multiplayer combat, featuring the ability to control bloons directly and send them charging past your opponent's defenses. Bloons TD Battles is a free to play, tower defense and multiplayer game developed and published by Ninja Kiwi. Released on April 20th 2016 has received 29,096 reviews of which 26,414 were positive and 2,682 were negative resulting in a rating of 8.9 out of 10. Thanks to its free to play tag and a daily player base of 275, this game has secured the #2 spot in the ranking of free games like SENTRY.
8.9
26,414
2,682
275
players
3. Bloons Monkey City
Similarity 44% Create, upgrade, and customize your very own Bloons Monkey City in this groundbreaking blend of city building and tower defense awesomeness! Bloons Monkey City is a free to play, strategy and action game developed and published by Ninja Kiwi. Released on April 10th 2020 has received 6,222 reviews of which 5,676 were positive and 546 were negative resulting in a rating of 8.8 out of 10. Thanks to its free to play tag and a daily player base of 272, this game has secured the #3 spot in the ranking of free games like SENTRY.
8.8
5,676
546
272
players
4. Ninja Kiwi Archive
Similarity 40% Enjoy some of the best loved Flash games of the past in this awesome time capsule of over 60 Ninja Kiwi classics. Experience a piece of history and play the original Flash games that spawned the worldwide phenomenon of Bloons TD. Ninja Kiwi Archive is a casual, arcade and strategy game developed and published by Ninja Kiwi. Released on July 08th 2020 has received 5,439 reviews of which 5,107 were positive and 332 were negative resulting in an impressive rating of 9.1 out of 10. Attracting a solid base of 160 players due to its free access, this strategy game has achieved the #4 position in the best free games like SENTRY.
9.1
5,107
332
160
players
5. Bloons Adventure Time TD
Similarity 50% Defend Ooo from the Bloon invasion in this epic tower defense crossover. Bloons Adventure Time TD is a strategy, action and tower defense game developed and published by Ninja Kiwi. Released on January 16th 2019 has received 4,302 reviews of which 3,743 were positive and 559 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #5 spot among the most played free games like SENTRY.
8.4
3,743
559
89
players
6. Royal Revolt II
Similarity 44% Royal Revolt 2 is an asynchronous PvP Reverse Tower Defense game full of medieval magic and action-laden battles.Can you set up your defenses so other Kings and Queens can't crash your castle gates? We're throwing down the gauntlet. Will you pick it up? Royal Revolt II is a action rpg, tower defense and strategy game developed and published by Flaregames. Released on May 19th 2021 has received 324 reviews of which 246 were positive and 78 were negative resulting in a rating of 7.1 out of 10. The game currently holds the #6 spot among the most played free games like SENTRY.
7.1
246
78
39
players
7. Zombie Defense
Similarity 48% A modern hybrid of the classic RTS and modern Tower Defense. Recruit soldiers, place them on slots and let them shoot incoming waves of zombies by their own. Order supplies, throw grenades, order airstrikes and many more... Perfect mix of strategy, tactics and micromanagement. Zombie Defense is a free to play, zombies and tower defense game developed and published by Home Net Games. Released on September 30th 2016 has received 2,157 reviews of which 1,811 were positive and 346 were negative resulting in a rating of 8.1 out of 10. The game currently holds the #7 spot among the most played free games like SENTRY.
8.1
1,811
346
18
players
8. Toaster Arena
Similarity 41% Toaster Arena is a first person multiplayer arena shooter where players battle it out on different maps and game modes. Use Advanced movement to traverse obstacles and gain the advantage on the battlefield. Toaster Arena is a early access, action and fps game developed and published by Shadow_hawk. Released on January 20th 2025 has received 322 reviews of which 294 were positive and 28 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #8 spot among the most played free games like SENTRY.
8.4
294
28
6
players
9. Yet Another Zombie Defense
Similarity 41% Darkness is coming. How long can YOU survive? Build your base by day, defend it by night. Play in online or local co-op. Stay alive as long as you can. Yet Another Zombie Defense is a zombies, survival and multiplayer game developed and published by Awesome Games Studio. Released on March 28th 2014 has received 12,053 reviews of which 10,433 were positive and 1,620 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #9 spot among the most played free games like SENTRY.
8.4
10,433
1,620
4
players
10. Citywars Tower Defense
Similarity 45% Citywars TD is a cute multiplayer third person Survival Tower Defense. Build towers, gather resources, craft tools, upgrade weapons, level up buildings, expand your city with your friends and work under pressure before the next incoming wave of monsters. Citywars Tower Defense is a early access, strategy and tower defense game developed and published by 01 Studio. Released on March 03rd 2022 has received 1,104 reviews of which 893 were positive and 211 were negative resulting in a rating of 7.7 out of 10. The game currently holds the #10 spot among the most played free games like SENTRY.
7.7
893
211
4
players