GravityCore — Playable Demo (Free for Everyone)
GravityCore is now live — and the playable demo is free for everyone.
GravityCore is my custom gravity plugin for Unreal Engine 5. Three gravity shapes in one plugin: Sphere volumes for planets (walk all the way around), Cylinder volumes for ring worlds (walk the inside, Halo-style), and Box volumes for flip-gravity zones.
The hard part isn't the math — it's making it work in multiplayer. Most planet gravity solutions break the moment two players join the same level (proxies tilt, jitter, animation flickers between walk and fall). GravityCore computes gravity deterministically from position on every machine, so simulated proxies stay surface-aligned and smooth.
Download the playable demo below — Windows packaged build, no Unreal Engine required. Walk a planet, walk the inside of a ring world, step into a flip-gravity room.
What you'll experience:
✔ Sphere gravity — walk around a planet
✔ Cylinder gravity — walk the inside of a rotating ring world
✔ Box gravity — flip-gravity room (down becomes up)
✔ Override zone — small flip-gravity area inside a larger gravity field
✔ Debug visualization toggle (see the volumes)