Flame effect to player's thrust
Copernicus Mode toggle, which allows you to play the game with the game world fixed, or centered around the player. (C Key)
Two levels of difficulty. The speed of the rocks and player have been tweaked to make the game a bit more playable. (D key)
Fixed game so player won't spawn in the middle of rocks
Added new timing code in an attempt to make the game run more smoothly.
Added fullscreen toggle (ALT-Enter)
Added game pause. (P Key)
Fixed player thrust sound to eliminate 'clicking'

As many people have heard discussed, there was quite a desire to remake DOOM as our next project after Q3. Discussing it brought an almost palpable thrill to most of the employees, but Adrian had a strong enough dislike for the idea that it was shot down over and over again.

It wasn't planned to announce this soon, but here it is: We are working on a new DOOM game, focusing on the single player game experience, and using brand new technology in almost every aspect of it. That is all we are prepared to
say about the game for quite some time, so don't push for interviews. We will talk about it when things are actually built, to avoid giving misleading comments.

-John Carmack