A new element that spreads to neighboring cells and decays over time. It infects adjacent particles, converting them into more virus, then dies out after a set lifespan.

A controllable player in the 2D simulation that also renders as a pixelated 3D citizen model overlaid on the canvas. It walks, runs, jumps, and swims. In water it floats at head level. Dive with S, swim up with Space. The 3D model is rendered through a separate low-res camera for a retro pixelated look.

 Speed control for the simulation. You can slow down or speed up the tick rate to watch interactions in detail or fast-forward through long processes. Physics stays framerate-independent so behavior is consistent at any speed.

Thumbnails from community workshop saves can be hidden if they contain NSFW or unwanted content. Hidden thumbnails are filtered out from the browse view.