You might check out some of the different game bundles available right now, they can quickly give you a lot of good games to play for cheap.

One month of humble choice ($15) will get you Nine Sols, Like a Dragon Gaiden, Streets of Rage 4, and a bunch of other games.

Fanatical has a ton of build a bundle available right now for their winter sale. Of those bundles, the Prestige, Best of Platinum, Winter SuperStars, and Play on the Go bundles are all especially recommendes.