THE GOOD: Kick-ass soundtrack - gothic and rock
Detailed graphics
Intuitive gameplay - and mostly, the base of modern FPS
Interesting level design
Five difficulty modes with difference in enemies, items and weapons in some levels
You can lead your character on the map view
Face animation
Complete HUDTHE BAD:
No jumping gameplay, the only missing basis in FPS
If graphics are detailed for a game of this era, you can imagine that they're also pixelised and some of you can be bothered by it.
Some levels are just large and with multiple ways to get to a point - you can be lost
Some secrets are simply very hard to get or to findSUMMARY:
If Doom wasn't existing, you wouldn't play FPS today
It's perhaps not true as Wolfenstein 3D or Quake were also important for founding the FPS genre but without Doom, it wouldn't have...