SAND is based on Ethereum and used in The Sandbox, a blockchain-based metaverse where players can create avatars and own virtual land.

Source: https://www.insurancejournal.com/news/national/2023/06/13/725069.htm

The Sandbox is a play-to-earn blockchain game that lets players create a virtual world using non-fungible tokens (NFTs), it is an Ethereum blockchain.

Source: https://cyprus-mail.com/2023/03/06/renq-finance-renq-will-give-better-profits-than-decentraland-mana-and-the-sandbox-sand-experts-predict/

The Sandbox mode is even getting overhauled since it is receiving six new square levels based on the six biomes in the game.

Source: https://www.comingsoon.net/games/news/1276355-jurassic-world-evolution-2-feathered-dinosaur-dlc