3. Doom (1993)

It might not be the original first-person shooter, but it might as well be considering how many FPS games released after Doom just copied it entirely. For a time in the ‘90s, first-person shooters weren’t even called first-person shooters, but instead “Doom Clones.” What’s impressive about Doom is that going back to the game in 2021 it still holds up. It’s still a blast to mow down hordes of enemies with the chaingun or dodge imps’ fireballs while charging them with your trusty shotgun. Doom’s only major issue is its limited roster of enemies. This problem would be solved in Doom II.