INERTIA
The Open Home for Battling-Top Design.
Design custom tops. Play them in real physics. Keep credit - and a cut - when others build on your work.
ONE OPEN PLATFORM
A common, attributed home for original battling-top designs - built on the open Zephyr protocol. Deposit a design, play it, fork it, print it. Credit and payment follow the work.
ARC
Arc is the open simulator: upload a design and play it instantly in real, geometry-driven physics. No stats to game - your shape, weight, and contact points are the gameplay. Runs offline; point it at any design library and iterate before you ever print.
The open engine the community builds toward true-to-life. Free, forever.
How it works →
REGISTRY
Upload a design to Inertia and it's logged with attribution. Fork or remix it and the lineage stays linked back to every author. You set the license and royalty terms - and they travel with the file wherever it goes.
Makers get seen among peers. Credit is native, not an afterthought.
How it works →
PRINT & GET PAID
Order a print through the platform and one payment fans out automatically - to every designer in the lineage and the manufacturer who makes it. Real money over open payment rails. No token, no middleman markup.
Buy a top, and the people who designed it are paid in the same click.
How it works →
INERTIA APP
The companion for competitive play, live in open beta today. Run tournaments that save organizers 90 minutes, track practice, build combos, and archive your battles.
Free, forever. Download today.
Download now →DESIGN. PLAY. BUILD ON IT.
One geometry spine runs the whole loop. The same file you design is the file you play, fork, and print - and credit follows it at every hop.
Design
Model an original top in CAD and export a STEP file - structured geometry, not triangle-soup mesh.
Simulate
Drop it into Arc and battle it in real physics. Watch how the geometry actually behaves before you commit a print.
Deposit
Log it in the registry with attribution and your own license + royalty terms attached to the file.
Fork & Remix
Anyone can build on it. Every iteration stays linked to the lineage it came from - yours included.
Order it from a print-on-demand maker in plastic or metal, straight through the platform.
Get Paid
One payment splits along the chain - every designer in the lineage, plus the maker who printed it.
CREDIT THAT FOLLOWS THE WORK
"Make the sport legible so the athlete can be seen.
Make creativity legible so the creator can be seen -
and paid."
Designs here are open, so anyone can build on them - and the community owns the geometry, the mechanics, the launcher. Attribution is verifiable; payment rides real money over open payment rails. Cryptography, not cryptocurrency - no token, no speculation. Inertia is the platform; the open Zephyr protocol is what lets credit travel with the work.
WHERE WE ARE
Built in the open, foundation first. Here's what's live, what's proven, and what's next.
Inertia App - Open Beta
Live NowThe competitive-play companion is live and free - tournament automation, practice tracking, combo building. The community foundation everything else connects to.
Geometry Engine - Tier-0 Validation
ProvenReal community designs separate cleanly into attack / stamina / defense archetypes from geometry alone - zero authored stats. The "your shape is the gameplay" thesis holds on real files.
Arc - The Simulator (MVP)
In DevelopmentLoad a design, drop it in a bowl, and battle it. The open engine the developer community grows toward true-to-life fidelity.
Design Registry + Attribution
In DevelopmentDeposit, fork, and remix with machine-checkable lineage - built on the open Zephyr protocol so credit and terms travel with every file.
Print-to-Pay Loop
NextOrder a print and one cross-border payment splits fairly across every designer in the lineage and the maker who printed it - real money, no token.