Single-player games like Mothiary
Below are 9 single-player Steam games similar to Mothiary, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Mothiary page.
Ranked picks
- 1
Whimsy Koi
Single-player alternative to Mothiary — playable solo, no multiplayer required. Shares Simulation with Mothiary.
Whimsy Koi is a cozy idle game where you manage calming koi ponds. Collect various whimsical koi fish and decorate your ponds however you want. Just relax and enjoy the tranquil experience.
- 2
Mammalarium
Single-player alternative to Mothiary — playable solo, no multiplayer required. Shares Simulation and Casual with Mothiary.
Relax and collect over 500 unique mammals in this cozy idle game. Watch babies grow into magnificent adults in real-time, customize warm woodland habitats across 9 themed packs, and discover rare species from tiny shrews to great whales.
- 3
Space Catnips
Single-player alternative to Mothiary — playable solo, no multiplayer required. Shares Simulation and Casual with Mothiary.
Space Catnips is an incremental game where you harvest catnips from alien planets and showcase them in your bar to attract a wide variety of space cats!
- 4
Lepidarium
Single-player alternative to Mothiary — playable solo, no multiplayer required. Shares Simulation and Casual with Mothiary.
Relax and collect hundreds of unique butterflies and moths in this cozy idle game. Watch caterpillars transform from larva to chrysalis to winged beauty, customize lush greenhouses, and discover rare species from monarchs to atlas moths.
- 5
Pip sellfish
Single-player alternative to Mothiary — playable solo, no multiplayer required. Shares Simulation and Casual with Mothiary.
Catch fish by drawing circles around them, sell them in Pip's little beach shop, and reinvest everything. Fish, sell, upgrade, repeat. A cozy fishing incremental game.
- 6
Critter Caboodle
Single-player alternative to Mothiary — playable solo, no multiplayer required. Shares Casual with Mothiary.
Watch and play with quirky critters as they generate loads of money for you in a unique idler/creature collector hybrid.
- 7
Amphibarium
Single-player alternative to Mothiary — playable solo, no multiplayer required. Shares Simulation and Casual with Mothiary.
Relax and collect hundreds of unique frogs and salamanders in this cozy idle game. Watch tadpoles undergo metamorphosis in real-time, customize lush terrariums, and discover rare species. Let your vivarium thrive in the background while you work or study. Start your collection today!
- 8
Tiny Egg Clicker
Single-player alternative to Mothiary — playable solo, no multiplayer required. Shares Simulation and Casual with Mothiary.
An idle pet-collecting clicker game that keeps you company at the bottom of your screen. Click your egg to help it hatch. Grow your collection of pets to unlock upgrades and rarer eggs. Relax to chill Lofi music while you play at your own pace. Will you hatch the shiny variant of each pet?
- 9
Volt Ventures Idle
Single-player alternative to Mothiary — playable solo, no multiplayer required. Shares Simulation and Casual with Mothiary.
An idle game of growth and strategy. Build, upgrade, and prestige your way to limitless power.