Pixel Rain

Paint pixels. Watch chaos unfold.
Pixel Rain is a relaxing falling-sand physics sandbox where every cell on a giant grid obeys its own rules. Pour water, drop sand, ignite lava, grow crystals — then sit back and watch it all interact.
There's no campaign, no fail state, no pressure. Just you, a canvas full of physics-driven pixels, and a lot of satisfying emergent behaviour.
Hundreds of Materials to Paint With
Sand — piles and settles naturally

Water — flows, pools, and reacts with almost everything

Lava — turns water into steam, melts ice, ignites everything nearby

Acid — slowly corrodes stone, metal, and crystal

Oil — floats on water, highly flammable

Crystal — grows from water and ice into spreading formations

Plant — feeds on water and spreads organically

Plasma — decays into sparks over time

Void — silently erases everything it touches

Magnet — pulls nearby metal cells toward it

Plus: Paint, Slime, Foam, Snow, Ice, Smoke, Spark, Stone, Metal

…and 400+ more — from concrete, salt and sawdust to charged crystal, living wood and brimstone. Combine any two materials and you might discover a brand-new one.

Features
60 FPS physics simulation on a dynamic grid up to ~620×480 cells

400+ paintable materials and brush presets with scatter, sparkle, and jitter tuning

6 customizable quick-slot brushes

Adjustable gravity, flow speed, brush size, and zoom

3 procedurally synthesized music modes: Rain, Magma, and Aurora

Procedural sound effects keyed to each material — no audio files, all generated in real time

One-button MP4 clip export (R to record, R to save)

Showcase cinematic mode (T) — the camera finds the most active region of your canvas and records it automatically

Save and load your canvas, synced across devices with Steam Cloud

100+ Steam achievements with progress bars and in-game toasts

50+ discoverable recipes — combine two materials to alchemize a third

Steam Workshop — design your own materials, brushes and animations with built-in editors (plus a DevMode code editor), then share them and subscribe to community creations

Built-in tutorial to get you started

Custom color palette and lobby theming

Early Access
Pixel Rain is in Early Access. The core simulation is fully playable and stable. Expect new materials, brush tools, and quality-of-life improvements as development continues. Feedback welcome.