CrossLink

CrossLink is a GPS-based role-playing game developed by Japan's Platinum Egg team, connected to the IOST mainnet in October 2020, merging real maps with virtual combat: players dispatch heroes anywhere on earth, travel to destinations, and fight the alien lifeform Metios, choosing manual or automated combat, with equipment and rewards earned from raid bosses. On the asset side, the team built its own ERC-721-like token protocol called Tokenlink, with weapons, equipment, and virtual land existing as NFTs on IOST and tradable on secondary markets; the game shipped on iOS and Android, with over 250,000 users disclosed and no upfront spend required to play.

The project later announced integration with Concordium, valuing its protocol-level identity and KYC framework to lower the entry barrier for non-crypto users, and the task record lists both IOST and Concordium as its ecosystems.