Monsters:
 - New enemy: Cacospecte. Spectrized Cacodemon with more healts, faster movement speed and lower pain chance.
 - Arachotrons shoot at faster rate. Their projectiles have increased flight speed.
 - Mancubus replaced with Chaos Serpent from Hexen. Beware they are far more dangerous than their Hexen version.
 - Archvile has new devastating attack. He creates multiple delayed explosion directly on player's position (you can just step away from it). Yes, no more "find cover or get fried" mechanics. But don't worry, they are still extremely dangerous enemies, just in other way.
 - New boss enemy: Ubervile. Boss version of Archvile. It uses same attack as normal viles but also has more health and new special attack.
 - Baron of Hell attacks faster. His attacks are doubled.
Weapons:
 - Pistol replaced with Burst Rifle. Perfect accuracy hitscan weapons which fires fast triple shots. 
 - Chaingun has now faster fire rate, but also goes into cooldown state after stopping fire (similar to Plasmagun).
 - Plasmagun projectiles deal slightly more damage.
Other:
 - All original doom light sources replaced with Hexen's and Heretic's ones.
 - Also added some decorations from Hexen.