Games like Desktank
Games like Desktank include Tiny Aquarium: Social Fishkeeping, Chillquarium, WEBFISHING, Kenshi, and Fish Game. We matched them by the tags players give Desktank on Steam (Immersive Sim, Collectathon, Creature Collector, Idler, and Sandbox): closest matches first, and among equally close ones the better-known games.

Tiny Aquarium: Social Fishkeeping
Shared: Collectathon · Creature Collector · Idler

Chillquarium
Shared: Collectathon · Creature Collector · Idler

WEBFISHING
Shared: Fishing · Creature Collector · Collectathon

Kenshi
Shared: Sandbox · Immersive Sim · Crafting

Fish Game
Shared: Immersive Sim · Creature Collector · Sandbox

Megaquarium
Shared: Sandbox · Creature Collector · Management

Cookie Clicker
Shared: Idler · Collectathon · Management

Tiny Pasture
Shared: Idler · Creature Collector · Cute

Fish to Dish: Idle Sushi
Shared: Idler · Creature Collector · Fishing

PC Building Simulator
Shared: Immersive Sim · Sandbox · Management

Placid Plastic Duck Simulator
Shared: Collectathon · Immersive Sim · Cute

Luna's Fishing Garden
Shared: Collectathon · Idler · Sandbox

Cornerpond
Shared: Idler · Creature Collector · Fishing

Potion Craft: Alchemist Simulator
Shared: Crafting · Management · Sandbox

Cast n Chill
Shared: Idler · Creature Collector · Fishing

Bugtopia
Shared: Collectathon · Idler · Creature Collector

Aquarist
Shared: Sandbox · Fishing · Management

Planet Zoo
Shared: Management · Sandbox · Nature

MyVoiceZoo
Shared: Creature Collector · Sandbox · Idler

Graveyard Keeper
Shared: Crafting · Sandbox · Management

My Little Life
Shared: Idler · Creature Collector · Collectathon

Waterpark Simulator
Shared: Immersive Sim · Sandbox · Management

Joyquarium
Shared: Creature Collector · Idler · Fishing

Garden Galaxy
Shared: Idler · Sandbox · Cute