Single-player games like Molluscarium
Below are 14 single-player Steam games similar to Molluscarium, 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 Molluscarium page.
Ranked picks
- 1
Amphibarium
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Simulation with Molluscarium.
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!
- 2
Reptilarium
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Simulation with Molluscarium.
Relax and collect hundreds of unique reptiles in this cozy idle game. Watch eggs hatch and babies grow in real-time, customize stunning terrariums, and discover rare species from geckos to chameleons.
- 3
Chillquarium
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Simulation and Casual with Molluscarium.
Chillquarium is a cozy and relaxing idle game. Buy fish and raise them in real time, then sell them to turn a profit! Customize your aquarium as you progress from a simple starter tank to your dream setup by filling your collection with rare exotic fish and ultra-rare color variants!
- 4
101 Cats
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Casual with Molluscarium.
Join this adventure and discover the hiding places of 101 kittens 🐾 hand-crafted landscape. 🏆 Earn lots of achievements. How many 😺 can you find? 🔎 Be quick! ⏱️
- 5
101 Cats in Dubai
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Casual with Molluscarium.
Join this adventure and discover the hiding places of 101 kittens 🐾 in the hand-crafted Dubai landscape. 🏆 Earn lots of achievements. How many 😺 can you find? 🔎 Be quick! ⏱️
- 6
100 Cats Singapore
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Casual with Molluscarium.
Find 100 Cats hidden in Singapore! Can you find them all? 😺
- 7
Lost and Found Co.
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Casual with Molluscarium.
Lost and Found Co. is a hidden object adventure in a cozy and immersive world. Join a cast of lively characters on their epic journey across countless magical locations. Find lost items, solve puzzles, and help a tiny dragon regain her power!
- 8
Bug & Seek
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Simulation with Molluscarium.
Catch 200+ real life bugs in this peaceful creature collector. You’ve bought the local insectarium (bug zoo) in the cozy town of Buggburg, so start swinging your net to build your dream bug collection and create the best insectarium Buggburg has ever seen.
- 9
Easy Bubbles
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Simulation with Molluscarium.
Easy Bubbles is a relaxing aquarium simulation filled with cute sea creatures. Manage your aquarium with click and idle mechanics, collect resources and have a pleasant experience in the colorful and peaceful underworld.
- 10
Pixel Empires
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Casual with Molluscarium.
An idle tower defense in a pixel fantasy kingdom. Your village builds itself. Your army fights on its own — but the bow is yours to draw whenever the night gets loud. Sleep through the siege, or pick up the arrow. The night is long. The bow is yours.
- 11
Aviarium
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Simulation with Molluscarium.
Aviarium is a relaxing sky sanctuary simulation filled with cute birds. Manage your floating aviary with click and idle mechanics, collect resources, and enjoy a pleasant experience in a colorful and peaceful world above the clouds.
- 12
The Carcass
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie with Molluscarium.
A typing-driven Lovecraftian colony sim. You wake inside the corpse of a dead god, adrift in space. Carve a roguelike colony from procedurally generated anatomy — negotiate with rival alien factions, evolve occult mutations, find your ending. The carcass remembers.
- 13
Lepidarium
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Simulation with Molluscarium.
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.
- 14
Dinosaurium
Single-player alternative to Molluscarium — playable solo, no multiplayer required. Shares Indie and Simulation with Molluscarium.
Relax and collect over 500 unique dinosaurs in this cozy idle game. Watch hatchlings grow into towering giants in real-time, customize prehistoric habitats across 9 themed packs, and discover rare species from tiny raptors to mighty sauropods.