If DOOM (the 2016 version) isn’t quite your style of FPS, maybe Intrude will fit the bill. This indie game takes its cues from an earlier era of shooters and calls to mind classics like (the original) DOOM and Wolfenstein 3D.
Intrude sticks players in an underground military base buzzing with enemies. As you progress through the fifteen different stages you’ll get new weaponry and collect top secret data.
It appears Intrude only supports Windows but it does come with Steam Achievements and leaderboard support. Intrude is available now with a launch week discount of $5.39.