you can checkout the sui ecosystem to get more information on that. checkout sui directory

It's hard to give an exact, real-time number, but there are easily a few dozen fully on-chain games currently active or deep in development on Sui, with more emerging regularly. It's a significant focus for the ecosystem.

Only a couple of fully on‑chain games are live on Sui today, with a few more in active development:

The flagship examples are Sui 8192, a fully on‑chain 2048‑style puzzle game where each move and game instance exists entirely as on‑chain objects (Sui Directory), and Dungeon Move, a browser‑based pixel‑art game whose entirety—logic, characters, animations—is stored and executed on chain (Medium). Both are true examples of fully on‑chain gaming.

In terms of games in development, Sui has a growing roster of titles slated for 2025, including both Web2/Web3 hybrids and Web3‑native experiences like Cosmocadia, Samurai Shodown R, Brave Frontier Versus, and Code of Joker: Evolutions (Medium, GAM3S.GG). However, most of these lean on off‑chain logic or are only partial-chain games, not fully on‑chain implementations.

So in summary:

• Active and fully on‑chain: 2 games (Sui 8192, Dungeon Move)
• In development / upcoming: several titles, but none confirmed as fully on‑chain

If you're evaluating for a project, most of what’s fully on‑chain remains niche to date. The broader wave of games for 2025 tend to combine Web2 elements or off‑chain infrastructure, with object‑centric and dynamic NFT capabilities on the on‑chain side.

You can dive deeper into Sui’s fully on‑chain gaming and upcoming titles at the Sui Developer Docs – Gaming on Sui and the Sui gaming announcement from GAM3S.gg