Free-to-Play is a new concept initiated by Thetan Arena since the first version. We find that the players must invest a certain amount of money in playing the game is unreasonable and prevents many traditional players from playing NFT games. In an e-sport game, the more players, the better the battle. Pay to Play limits the expansion of Thetan Arena in the future. That's why we decided to build a Free-to-Play model, and players don't need any investment to play the game.