Creator's Asteroid

Creator's Asteroid is a tile-based maker for 2D action-adventure platformer worlds with a papercraft theme. You design worlds, playtest them, and share them with friends or through Steam Workshop. You can also play worlds made by others.

Design a world

In Maker Mode, you build with drag-and-drop tiles. A world can contain up to 81 rooms in a 9x9 layout, with each room measuring 29x13 tiles. There are over 500 distinct tiles and over 50 unique upgrades to mix and match.

You can add destructible and indestructible terrain, enemies and boss enemies with unique behaviors, and hazards such as spikes, ability sappers, water and extreme environments. Ability upgrades boost attacks, increase mobility and unlock new powers; decorations and signs let you add detail and guide players.

Playtest and share

Test your design one room at a time or from the beginning. When you're satisfied with the world, play it from start to finish to generate a shareable world file.

The game also includes over a dozen playable training stages that introduce many of the level elements and upgrade abilities available for your designs. You can start by designing instead and learn as you go.