It isn't built on a blockchain. So it's a hybrid game. Its INF token is built on the Liquid blockchain, though. Liquid is a bitcoin layer-2 blockchain that processes transactions much quicker than bitcoin. It's popular in the bitcoin community. If Infinite Fleet were actually built on chain, it would be the first video game on the Liquid network. But since only the token is on chain, Infinite Fleet only has quasi-web3 status.