BEP-1155 is the multi-token standard that combines the fungibility of BEP-20 and the non-fungibility of BEP-721 in one contract, which finds a middle ground of fungibility-agnostic and gas-efficient (yes, cheaper gas!).
With a single BEP-1155 contract, users can deploy a token economy with fungible (tokens) and non-fungible (NFTs). Crypto projects like Axie Infinity have adopted similar models incorporating BEP1155 and multi-asset / token smart contracts into their gaming tokenomics.
BEP1155 in the X World Games will be an NFT-like asset that can be traded across all NFT marketplaces, like Opensea, Looksrare, and our official X Marketplace.