Doom + Doom II

As the father of First Person Shooters I respect the cultural impact that Doom has left. The three stars are less for Doom and more for Doom 2. Doom 1 being the FPS game that defined all FPS games. Its fun factor is told through how you play with 6 guns at your disposal you are forever on the run and gunning down everything you see. The game is perfectly balanced with an odd bit of difficulty spike in later stages. Doom 2 however throws too much too quick, so the player will certainly find it harder to progress especially in early levels. My advice is to play the first game if you just want fun and the second game if you think you're ready for the challenge ahead