At the beginning of the game, you can choose which weapon you'd like to start with. The shotgun is very powerful but quite slow, while the pistol, for example, doesn't deal as much damage but is a lot faster.
Now, just like in a traditional beat 'em up, you can enter combinations of buttons to be able to use the rocket launcher. So using the 'special' button you can gain access to the BFG 9000, which makes destroying the enemies on your screen pure child's play.
Graphically, Doom Ultra-Violence is lacking. The majority of the models have been taken directly from the original game, leaving animations - like jumping - a little clumsy.
Despite its flaws, Doom Ultra-Violence is an interesting game. It may not be one of the best OpenBor games available, but it's sure to please any fans of the Doom franchise.