If you want some games that doesn't need to invest in order to play and earn at the same time, I can suggest the following:
1. Taroverse (PC, Android and iOs) - earn TARO tokens every month for playing their mini-games
2. Crazy Defense Heroes (Android and iOs) - earn TOWER tokens daily for playing
3. Blankos Block Party (PC) - earn NFTs for completing challenges and sell them in the Mythical marketplace
4. Splinterlands (PC, Android and iOs) - earn DEC tokens by playing card game battles and be one of the top in the leaderboard every season as well as getting lucky to opening chests for additional perks
Hope this helps you a bit but don't make P2E as your full-time career. That hype is already over. However, this is way better than traditional games due to owning these NFTs.