Coming soon

About This Game

A terrarium that lives on your desktop

Monstarium sits along the bottom of your screen, on top of your other windows, and stays out of the way. Clicks go straight through to whatever is behind it. Only the monsters themselves catch your mouse.

They don't stay put

Monsters wander off the strip and climb on top of your open windows. Move a window and they tumble back down.

Hatch, merge, evolve

Buy an egg, wait a minute, meet someone new. Drag a monster onto its twin and the two become something bigger. There are 37 evolution lines, 95 forms and 5 biomes to open, with new species turning up every day of your first week.

Collect every look

Each form comes in 4 colors and 6 rare variants: crystal, autumn, spotted, starry, rainbow and one that belongs to its biome. That adds up to 950 looks. A built-in guarantee means you are never stuck hunting the last one forever.

They have a life of their own

• Pet them, drop a treat and watch the race, or throw the ball around.
  
• Monsters that play together become best friends.
  
• Open a monster's diary, give it a name, or take it for a walk on a leash.
  
• Birthday hats, Christmas caps, real seasons, a rare golden visitor, hide and seek, and a few secrets.

Idle for real

Nobody starves and nobody dies. Nothing piles up while you are busy. Leave it alone for a week and your monsters are still there, glad to see you.

A companion for work and study

Pick a favorite to live in the corner of your screen. Feed it, play with it, and it keeps you company: it reminds you to drink water, naps through your focus sessions and cheers when you finish. It never gets sick. It just misses you. If you like, hide the strip and keep only your companion.

Made for the background

Monstarium earns coins while it is closed, goes to sleep when you step away and uses about as much of your PC as one open browser tab. There is a focus timer, a gentle water reminder and a clock on the strip if you want one.

For streamers

A green screen mode for OBS and an optional Twitch hookup. Viewers type !monster and a name in chat to name one of your monsters.

Features

• Always on top, with full click-through
  
• 950 looks to collect and 67 achievements
  
• Real daylight, seasons and optional real weather for your city
  
• 10 languages: English, Portuguese, Spanish, German, French, Polish, Russian, Simplified Chinese, Japanese and Korean
  
• Progress while the game is closed
  
• No account, no marketplace items, no battle pass, no tracking. Buy it once and it is yours

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

The monster sprites and their animation frames were generated with an AI tool (PixelLab) from our own written descriptions. Every monster was then picked, cleaned up and recoloured by us, and part of the animation (wings, breathing, walk timing) is done in code. The in-game text was written by us in Portuguese and English and translated into the other languages with AI assistance. Store page text was drafted with AI assistance and edited by us. Scenery, interface art and music are not AI generated.