IDLE DEVILS is a relaxed idle RPG that mixes automated combat, character collecting, equipment hunting, incremental growth, and light strategic management within an anime-styled demon world. Rather than demanding constant input, it focuses on the satisfaction of gradually building a stronger party and returning to see the results of previous investments. GOCORE developed the game, with publishing credited to GOCORE and NPC Entertainment. Its structure is especially suited to players who enjoy RPG progression but prefer managing builds and resources over repeatedly controlling every individual attack. The premise provides a suitable backdrop for the progression system. The Demon World has been overwhelmed by a dangerous miasma, with corrupted creatures threatening its stability and the struggle for the position of Demon King providing motivation for the journey. Players ultimately work toward conquering the seven hells and restoring order. The narrative is more of a framework for advancement than a deeply cinematic storyline, but that approach fits an idle game where character development, collecting rewards, and overcoming increasingly difficult encounters are the primary attractions. A major part of the experience revolves around cultivating female demons. Players can choose a character to develop and gradually conquer or recruit additional demons, creating a growing roster with different abilities and developmental possibilities. Skills provide some welcome customization because progression is not restricted to simply watching statistics increase. Deciding which characters deserve resources and determining how their abilities complement a particular approach gives the management side greater purpose. The anime character designs and mature themes, including sexual content and some nudity, are also prominent aspects of the presentation and clearly establish the audience the game is targeting. Equipment adds another important progression layer. Defeated enemies can provide gear of different qualities, while equipment affixes create opportunities to pursue increasingly desirable combinations. Higher-quality items can offer more valuable properties, turning repeated battles into a continuing search for meaningful upgrades. This loot-driven structure works particularly well with automated combat because even relatively passive sessions can produce something worth examining afterward. Finding a useful item, comparing its properties with existing equipment, and adjusting a character accordingly provides a satisfying sense that the player's forces are continuously evolving. Several additional systems keep progression from becoming entirely passive. The tavern offers opportunities related to obtaining equipment, gem merchants contribute to equipment enhancement, and alchemy provides another way to interact with accumulated resources. Individually, these mechanics are relatively straightforward, but together they establish a broader progression economy. Players regularly have decisions to make concerning where resources should go and which improvements will provide the greatest benefit. This helps distinguish the experience from extremely simple idle games where advancement consists almost entirely of purchasing increasingly expensive numerical upgrades. The Demon King's Tower provides a more obvious measure of growing strength. Progressing through tougher enemies creates goals for developed characters and optimized equipment, while special encounters can also contribute to expanding the roster. The tower structure complements the incremental design because encountering an obstacle encourages additional development rather than requiring highly demanding mechanical execution. Improving equipment, strengthening skills, adjusting characters, and returning later with a more powerful party creates the familiar satisfaction of overcoming something that previously seemed impossible. Automated and offline progression are ultimately at the center of the experience. Leaving the game and returning to accumulated resources makes advancement possible without constant supervision, which makes it particularly comfortable for short sessions. Players can collect what has been earned, inspect new equipment, make upgrades, organize characters, and then allow the underlying systems to continue working. The disadvantage is that anyone seeking highly interactive battles may find the action too detached. Much of the enjoyment comes from preparation and optimization rather than direct combat skill, so appreciation of incremental progression is important. Visually, the 2D anime presentation gives the game a recognizable personality, particularly through its demon characters. The overall interface has to communicate numerous statistics, equipment properties, skills, and progression options, meaning the experience is more functional than spectacular. Still, the character artwork complements the collecting aspect effectively, while the mature visual direction distinguishes it from more conventional fantasy idle RPGs. Steam Deck compatibility is officially rated Playable rather than Verified. The game performs well using its default graphics configuration, but portable play comes with several compromises. Some functionality is not fully accessible through the default controller configuration, so the touchscreen or a customized/community control layout may occasionally be necessary. Controller prompts can also display icons intended for a mouse, keyboard, or another controller, and some text may appear relatively small on the Deck's screen. The native display resolution is supported, although it may need to be selected manually. These issues prevent a completely seamless handheld experience, but the underlying game is compatible with SteamOS and its low-intensity idle gameplay is conceptually well suited to portable sessions. Overall, this is a specialized combination of idle progression and RPG customization rather than a traditional action-focused adventure. Its strongest qualities come from the interaction between character cultivation, randomized equipment, skills, recruitment, resource management, tower progression, and automated rewards. Repetition is naturally substantial, and players uninterested in grinding or passive advancement may lose interest quickly. For fans of incremental RPGs, however, there is an appealing rhythm to repeatedly improving a roster and watching those investments translate into greater power. The mature anime presentation gives it a distinct identity, while the multiple progression systems provide enough management to prevent the experience from becoming completely hands-off. Rating: 8/10