There are a lot of play to earn games out there, but in my opinion, the best one by far and away to this point is Gods Unchained.  It's a Hearthstone-clone trading card game, where you can use the forge to combine resources with your cards to mint higher quality versions and either show them off on the table, or sell them.  Granted, the game is still in beta and has a few kinks that need to be worked out. They are still working on balancing the cards and the Gods that you control during the match.  Of course what sets it apart from Hearthstone is that it is on the Ethereum Network, which means you actually own the cards that you earn or buy on the market.  When the game was first released, Ethereum gas fees made it very expensive to mint cards, and so they developed an L2 (layer two) solution for this called Immutable X.  IMX is a chain that allows players to mint cards and transfer them between themselves and other players for very little to no cost, depending on the activity. The way this is done is by combining 'flux' which you earn in game for winning battles, with small amounts of $GODS tokens (earned by playing the game, or bought / swapped for on exchanges) and multiple copies of cards to forge better quality, rarer versions of the card. These can then be sold on the Immutable X marketplace for $ETH, $GODS, $USDC, $GOG, or $IMX. This also is feeless, and you won't pay any gas fees until you decide to take your assets from IMX to Ethereum. 

There are 6 different Gods in the game, each with their own realm / portfolio of powers and abilities.  Each also has a mortal champion, of which you can collect their cards and play them in game - they are very powerful, but rare. Currently, one of the Gods has been deposed and replaced by their Champion! There are a vast number of neutral cards, and also a group of cards that each God can exclusively use specific to their domain. Among the cards themselves, there are different 'tribes' such as Amazons, Vikings, Wild Creatures, and so forth. I find this game to be a lot of fun, and even if you don't have the best cards, you really can compete at high levels of the game, they've done a great job so far of making sure it stays heavily p2e.

You can now earn daily $GODS rewards just for playing 10 games a day, and your payout depends on how well you do. 

I highly recommend at least checking out this game. You'll need your Metamask wallet connected to the Ethereum Mainnet.  After downloading and installing the software for the game, you also want to head over to Immutable.com and link your Metamask wallet. Again, this game is still in beta, and it's really great, it's definitely not to late to get involved. And it's just a lot of fun regardless of the crypto.  

As always, stay safe, be patient, and don't just HODL, stake it too!