ARC Aquarium (2026)

Developer: ACA Games
Platforms: Windows
Genres: Casual, Indie, Simulation
Rating: 5.0 of 5, 9 player ratings
Typical playtime: about 2.6 hours
Where to get it: Steam

How it feels

A calm, idle aquarium simulation where you collect fish and decorate at your own pace, with progression that continues even when you're away.

cozyrelaxedidlecollectiondecorativecasualbackgroundslow-paced

What players say

Players describe a very simple 2D idle aquarium simulator with 85 mostly similar fish and basic decorations. It is purely about watching fish grow and cleaning occasional dirt, with no deeper systems like gacha or minigames. Some note missing features like achievements, cloud saves, and settings to resize the window or change background music, but find it relaxing for casual background play.

Trailer

Screenshots

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