Played Ultimate Doom? Played Doom 2? Played Final Doom? Still want more? This is what you're looking for.

User Rating: 7 | Master Levels for DOOM II PC
This is a collection of levels released as an expansion (like Final Doom) for Doom 2. However unlike Final Doom these require the original Doom 2 in order to work. Each level is placed inside a specific WAD file and so, they can be played in any order the player desires. There is one file on the internet called masterlv.wad which puts all of them in one big wad file, making the thing less annoying to... play.

Anyway as for the levels, kind of like TNT, some are good, others are meh. I did enjoy most of them though, and if compared to Doom 2 they have a similar atmosphere. Among my favourite levels are Black Tower and Sea of Blood.

There is not much to say. These are just new levels that are especially fun in multiplayer. There are no new graphics except for a few new textures. Overall it's just what you would want to get if you played Doom 1/2 and Final Doom, and still want more.