Protostellar: Impact

You're a tiny asteroid with a big appetite, adrift in a field of planetary bodies. Consume anything smaller than you to grow — but collide with anything bigger and you're out of the round. Gravity complicates everything, constantly tugging you off course and toward the giants, so every approach is a fight between where you aim and where physics drags you. Inspired by a mix of agar.io and Spore's first phase, it's easy to pick up and tense to master: eat, grow, survive. The last asteroid still alive wins.

Inspired by the classic Agar.io game

1-8 players

Survival

Party Game

Space

Physics

Multiplayer

PlayNow!

Screenshots

Protostellar: Impact gameplay screenshot 1 – Start tiny, eat smaller planetary bodies to grow, and dodge the big planets. Last asteroid alive wins!

How to Play

Join the Game

Scan the QR code on the Game Screen with your phone to join as a player.

Fight Gravity

Use your phone to steer your asteroid through the field. Gravity tugs you toward every planetary body, so plan your approach before it plans it for you.

Eat Smaller Bodies

Fly into planetary bodies smaller than you to consume them and grow. The bigger you get, the bigger the targets on your menu.

Dodge the Giants

Touch a planet bigger than you and you're out for the round. Outlast everyone — the last asteroid still alive wins!

Frequently Asked Questions

How do you win Protostellar: Impact?

Survive longer than everyone else. Grow by consuming smaller planetary bodies and steer clear of bigger planets — one collision with something larger knocks you out of the round. The last asteroid still alive wins.

How many players can play Protostellar: Impact?

Protostellar: Impact supports 1-8 players. Bots fill any empty slots, so you can practice solo, play with a couple of friends, or fill a full lobby of eight.

Who made Protostellar: Impact?

Protostellar: Impact was created by Jens and Katja of GameLoom Studio, and it's the first third-party game on Gaming Couch. It began as a seven-day game jam project in 2023 and was later brought to the platform with the Gaming Couch developer tools. Under the hood it's written in C++ and compiled for the browser with Emscripten.

Is Protostellar: Impact like agar.io?

It's inspired by a mix of agar.io and the first phase of Spore, set in a casual space theme: start tiny, eat what you can, dodge what you can't — with gravity keeping every approach interesting.

About Protostellar: Impact

This game draws inspiration from the classic arcade game Agar.io, bringing the nostalgic gameplay into a modern multiplayer party game format.

Play Protostellar: Impact instantly in your web browser – no downloads, no installations required. Simply use your smartphone as a controller and start playing with friends and family.