Wow, you can play Doom 1 online.
Controls:
W, A, S, D or ARROW KEYS – movement
Q, E – strafe left, right
SPACE – fire
R – use door/switch
SHIFT – run
ESCAPE – menu
TAB – map
NUMBER KEYS – change weapon
Click on the image to play it in a popup window:
I forgot how hard it is to play first person shooters with the keyboard. And I forgot how old it is. Considering that the game is 15 years old, it’s graphics are surprisingly good.