I will advice you to use NFT marketplace like OpenSea, nothing much yet about NFT on this forum than to gain basic knowledge about what NFTs are, you can visit the altcoin boards because that is where what are related to NFTs are posted, but you will not yet see what you are demanding for. About NFT trading, OpenSea is good for that.
Thanks for the quick question, about NFT games ? Either them are getting around here ?! Or all based in the Altcoin section ?