Let the Obsession begin. Again. This time, the entire forces of the netherworld have overrun Earth. To save her, you must descend into the stygian depths of Hell itself! Battle mightier, nastier, deadlier demons and monsters. Use more powerful weapons. Survive more mind-blowing explosions and more of the bloodiest, fiercest, most awesome blastfest ever! Play DOOM II solo, with two people over a modem, or with up to four players over a LAN (supporting IPX protocol). No matter which way you choose, get ready for adrenaline-pumping, action-packed excitement that's sure to give your heart a real workout.
Operation Hydra is a ZDoom wad I have been working on for about 6 months: it's been difficult, but I think it's finally paid off. Bear in mind that Hydra is heavily inspired by Ultimate Simplicity and some of Torm's work, so hopefully you dig that sort of style. :P If this wad proves successful enough I might document the adventures of the other two marines, so stay tuned. Go to the Zdoom forums to PM the creator about any issues or suggestions you may have.
Say, I remember this one from the /idgames archive (made by Obsidian right?).
It is a neat little mapset (About 3 maps if I remember correctly?) involving Trites from Doom 3 and a couple other non-vanilla monsters, all I could really say needs improving is a better ending room :P
What does the .deh file do here?