Prodeus

Prodeus is a classic Doom clone through and through, but that isn't a knock at all. It nails the core mechanics well from the level design to pacing. While the enemies feel like reskinned versions of what you're familiar with, the gameplay loop works thanks to some solid shooting mechanics. Even though it lacks real innovation in the space and the multiplayer is practically dead, the inclusion of a map maker along with a plethora of custom maps almost negates those issues. Overall, shooting fans will like this one, and curious players can use as an entry point into the re-merging boomer shooter genre.