Free to playPixel Rain
A chill falling-sand pixel physics sandbox. Paint with hundreds of interactive materials — water, lava, acid, crystals, plants and more — discover recipes, build your own elements in the Workshop, and watch it all react in real time. No goals. No pressure. Just pixels.
Screenshots
From the Steam store
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.
