On-chain games on Ethereum can significantly boost user engagement with the DeFi ecosystem. By integrating decentralized finance mechanics into immersive gaming experiences, these games introduce players to DeFi concepts like staking, yield farming, and token swaps in a fun, interactive way. Players can earn tokens, trade NFTs, or participate in governance, seamlessly blending gaming with financial incentives. This gamification lowers the entry barrier, attracting non-crypto users to explore DeFi protocols. Popular games like Axie Infinity and The Sandbox have already shown how play-to-earn models drive adoption, with millions managing in-game assets on Ethereum. As more games leverage smart contracts, they create accessible gateways to DeFi, fostering broader participation and expanding the ecosystem.