GreasyDogMeat says: (Early Wolfenstein 3D engine) Even with First Person games in their infancy every game needed a gimmick and in Catacombs' case it was destructible walls. The villain of the Catacombs franchise, Nemesis, would go on to harass Dangerous Dave.

GreasyDogMeat says: (Wolfenstein 3D engine) It was originally developed as a sequel to Wolf 3D. It was unfortunately released a month after Doom II which hurt sales.

GreasyDogMeat says: (Wolf 3D engine) Some cool features that elevate it above a sprite/texture swap of Wolf 3D include usable vending machines, enemies who fake their deaths and the ability to revisit floors you have completed.

GreasyDogMeat says: (Wolf 3D Engine) Sequel to Aliens of Gold. A continuation of the story with a few new enemies and weapons. While it only has 20 levels compared with the original's 60 it has better graphics, more polish and better level design.

GreasyDogMeat says: (id Tech 2, the Quake 2 engine) This game has an excellent sense of progression. You start with nothing but a lead pipe and work your way up to being, well, the Kingpin of the city. Great atmosphere in grimy cities.

GreasyDogMeat says: (id Tech 2) An arena (Quake 3/Unreal Tournament style) shooter with cartoonish graphics. Features a unique dodge mechanic that allows you to bounce off walls. Good music too.

GreasyDogMeat says: (id Tech 2) If you can manage the horrible early levels and the even worse AI of your required companions some of the later levels improve quite a bit. Consider yourself lucky if you can make it through a few levels without the AI breaking.

GreasyDogMeat says: (id Tech 2) An excellent console style rpg (think Final Fantasy) with a great story and sense of humor from start to finish.