Single-player games like Mammalarium
Below are 16 single-player Steam games similar to Mammalarium, 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 Mammalarium page.
Ranked picks
- 1
Area 51
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
You are part of the team that is storming 'Area 51'. Find and release the aliens that are held captive and discover the mysteries that surround the base. Unlock new classes and abilities that will help you with your task as the military attempts to stop the hordes of people.
- 2
Pleasure Puzzle:Workshop 趣拼拼：拼图工坊
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
The best jigsaw puzzle jigsaw workshop, super simple operation to create your Jigsaw to share with the whole world! After subscription, it can not only be used in games, but also can be saved as local pictures. Refreshing operation and pleasing to the eye! Leisure and fun! The picture is released in the form of free DLC.
- 3
Cyber Driver
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
Cyber Driver is a small cyberpunk-style arcade flight game. It is fast, easy, tight, and repeatable, with elements of collection and challenges. Your only goal in the game is to constantly break the scores you have created before in the unique cyber atmosphere.
- 4
Flying Sword
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
"Flying Sword" is a flight game that uses only mouse to play (Play for 10 minutes each time). In the game you need to control the sword to fly and collect 'aura stone' as much as possible.
- 5
Ratropolis
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
A fusion of roguelite, tower defense, city-building, and deck-building! We created a new kind of real time strategy game filled with addictive and fast-paced gameplay. Create your deck, defend your city, and build the largest Ratropolis in history!
- 6
WHAT THE GOLF?
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
A silly physics-based golf parody where every golf course is a new surprising type of golf, some brilliant or hilarious, others so absurd you will ask yourself: WHAT THE GOLF?
- 7
LUFTRAUSERS
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
The skies are aflame and the seas will overflow with wreckage in Vlambeer’s stylish arcade shooter LUFTRAUSERS! Take to the skies in customized fighter planes to battle battleships, submarines, and rival aces for glory, honor, and high scores.
- 8
Goat Simulator
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
Goat Simulator is the latest in high-tech Goat Simulation technology.
- 9
Pixel Empires
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Casual with Mammalarium.
A pixel idle tower defense where your kingdom fights on its own. Workers gather, your army auto-battles endless waves, spells self-cast — you aim the bow, chain combos and choose what to upgrade. Bosses, titans, prestige, 100+ achievements. The night is endless. The bow is yours.
- 10
The Carcass
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie with Mammalarium.
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.
- 11
Lepidarium
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
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.
- 12
Reptilarium
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
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.
- 13
Molluscarium
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
Relax and collect over 500 unique molluscs in this cozy idle game. Watch larvae grow into stunning adults in real-time, customize vibrant aquatic habitats across 9 themed packs, and discover rare species from garden snails to deep-sea cephalopods.
- 14
Dinosaurium
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
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.
- 15
Compactor Baron
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
You're broke and the bills keep coming. Smash scrap into cubes, sell them, pay up. A short active incremental: aim, let the hammer swing, upgrade your tools, go bankrupt on purpose, and build a scrapyard that pays for itself.
- 16
Restore The Internet
Single-player alternative to Mammalarium — playable solo, no multiplayer required. Shares Indie and Simulation with Mammalarium.
A cozy incremental on a retro desktop. Restore forgotten websites one block at a time, then connect them: where you place each page changes its income, traffic and repair speed. Upgrade, automate, and finish with a proper ending. No forced resets.