Chillquarium

Chillquarium is an idle game with no failure state and no real urgency — buy fish, watch them grow over real-world hours, decide whether to sell them for cash or keep them around to earn passive income through ticket sales. The whole loop unfolds against a real-time day-night cycle in your tank.

The collection chase is the long-term hook. 156 unique species, each with rare and ultra-rare color variants, fill out through booster packs you unlock with progress. Feeding frenzies speed up growth, customization options let you arrange the tank and decorate it as your collection expands.

The aesthetic stays soft and unhurried — bubbles, ambient music, a single screen of your aquarium with the fish drifting through it. There's no combat, no minigames in the strict sense, just a steady accumulation of money and fish that makes the next tank a little fuller than the last one.