Epic, Amazing, It's almost 10 years from when it come out and I still play it like crazy...
Gameplay: Run and kill. Blast, run a little more, click a switch, run some more, kill some things. Blow stuff up, kill some more things, find a key, take the key, find the door it goes to, unlock it. Go though, continue. Etc. I love it!
Graphics: Hey, they were good at the time! But they didn't improve over Doom 1.
Sound: Dumb sounds. But the music was cool!
Value: Great replay value and it's a very long game. It's hard to stop playing after a while, ya know?
Overall: Get Doom Collectors Edition and play away.