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.
Unofficial updated version of Operation Apollyon - a complete weapons mod with 16(!) weapons total. Can be used with any monster mod, any map. Originally made by LossForWords on ZDoom forums.
I really like Operation Apollyon, so I made this unofficial update for it, which changes balance of the weapons, adds some features and make things faster, more powerful.
Original mod can be found here:
Essentially its a Weapons Mod that replaces the vanilla arsenal with 16 new weapons.
Stunkick Baton - stun and greatly kick enemies away!
Reflector Axe - chop enemies and reflect incoming projectiles back where they came from!
MK23 Stealth Pistol - starter gun, low damage, but does not alert monsters.
Mateba GBE Revolver - inspired by the Blame! manga, this rare low-ammo god revolver has absurd power.
Franchi SPAS12 - its a shotgun with a tight spread, useful even against farther targets.
Chiappa Triple Threat - 3-barreled shotgun, can be fired all at once or one-by-one. Lots of spread.
Silenced SMG - like pistol, but faster with bigger magazine yet less accurate.
TAVOR IWI - assault rifle, dependable and straight forward.
RML-8 Repeating Missile Launcher - homing missiles, but only if you have line-of-sight on targets! can be fired one-by-one or in a salvo of eight missiles at once. Devastating!
Grenade Launcher - bouncy bombs that detonate if they hit enemies directly or if timer runs out.
Flamethrower - burn baby burn, disco inferno. Its a flamer.
Cryo Blaster - freeze enemies, alt-fire will do a quick melee kick - useful to shatter frozen foes!
MeltPhace Napalm Cannon - burning fire nuke mega bomb inferno launcher. Throws fire everywhere and is extremely dangerous, can kill yourself easily but can also one-shot bosses or entire armies with this.
Pancor Shredder Nail Shotgun - massive mega shotgun that fires sharp nails that will tear through hordes of enemies with each shot.
M60 HEIAP Siege Machinegun - 150 rounds of non-stop explosive devastation. Stuns targets, heavy recoil and some splash damage. Can mow down crowds of enemies fairly fast.
Stealth Rail Cannon MK5 - its an accurate sniper rifle, except its also silent, penetrates through enemies, deals a lot of damage, has a scope, stuns enemies and has a cool trail. Effective, adaptive and versatile.
The mod can be played with any monster replacer mod, any mapset (except rare scripted ones) and is suitable for fast aggressive play against heavy enemy opposition.
All credits to original author(s), can be found inside the pk3.