Coming up with good opponents who do interesting things is an important skill, yet I see very few designs that show any talent in this area. Hardware issues The biggest changes in the series appear to be attempts to take advantage of improved hardware. This immediately put the designers in a no-win situation. By basing their design advantage on their technical prowess, they insured that they had to keep up with the latest hardware. This in turn forced them to require increasingly powerful machines.
Doom runs quite well, with only the rare stutter when lots of monsters appear.
But Doom II brings my machine to its knees. Even with all the options set to the most conservative settings, I experience frame rates of about 1 fps. Indeed, this problem goes beyond aesthetics. The problem comes with some of their timed puzzles, in which you must activate a door or elevator and then run or jump to it before it reverts to its original state. In several cases, I found that it was simply impossible to get the job done in the allotted time.