The Catacombs series never did seem to reach the same heights of popularity as Wolfenstein-3D but remain an important stepping stone in the FPS genre. So the question is - are they still worthwhile to play? In my opinion, most definitely yes. Catacombs 3D is the first 3D shooter of the series. It stands unique from the other 3D games in the pack by having a few neat little puzzles that require you to discern the hidden meaning in the scrolls that you pick up along the way. Catacombs Abyss was my first FPS shooter, so I'll always have a fond memory associated with it. It amps up everything that made Catacombs-3D great with more enemies and more level variety. Armageddon ramps up the enemy variety even more, and there's a few tricky enemies to deal with. Notable are the tiny little bunny-rabbits that you encounter in one level. They look innocent enough, until you let your guard down... The main downside to Armageddon is its over-reliance on walls that explode when you shoot them. Apocalypse has even more enemy and level variety and also makes use of a neat little 'hub' system for the first half of the game's levels. It adds a tricky new feature as well - walls that aren't walls at all, that you're allowed to walk through. This can be a bit of a backtracking pain. I replayed all four of the FPS titles in this pack after GOG re-released it, and can honestly say I had a great trip down memory lane doing so.
