ModOhFun! (v4.2)

A doom 2 gameplay mod where you fight stuff like killer fireball-throwing armor and chainsaw puking demons with your trusty weaponry such as the pistol/BFG hybrid and 360 chainsaw. Made entirely with code, so the file size is teeny tiny!

There are also several options to choose from, such as pistol start mode, infinite pistol mode, and enabling uber cubes to spawn,  should you open these cubes, monsters or a boss will appear, defeat them for a prize!

ModOhFun! requires Doom 2 and GZDoom or LZDoom to play, once downloaded just drag ModOhFun!__V#.#.pk3 over GZDOOM.exe/LZDOOM.exe to start playing, vanilla DOOM 2 maps are recommended, as they are less likely to break when playing with this.

Wiki page with some info on monsters n stuff! http://logicobscure.wikidot.com/modohfun