How does yield guild games work?

Could you elaborate on the workings of Yield Guild Games? I'm particularly interested in understanding how it combines the world of gaming with cryptocurrency and finance. I've heard that players can earn rewards and tokens through gameplay, but I'm unclear on the specifics. Could you explain how the earning mechanism functions? Also, what types of games are typically involved, and how do players access and participate in these games? Additionally, is there a requirement for players to invest in cryptocurrency to participate, or can they start earning rewards immediately? I'd appreciate a detailed overview of the entire process and how Yield Guild Games enables players to earn while gaming.