Features:
- Tons of new Death animations for all enemies. You can cut their limbs, cut them in half with chainsaw or minigun, melt them with plasma, Everything can be gibbed, there are even Xdeath states for large enemies like Barons and Mancubus, and much more. You can also shoot their dead bodies, or severed limbs, and keep brutalizing them even after their deaths. You can also use the quick-kick ability to kick their severed heads and limbs away and play bloody soccer.

- Possibility of headshoots for most enemies. You can do extra damage shooting at their heads with small firearms like the Rifle, or completely blow-up their heads with a higher firepower weapon such a shotgun or minigun.

- Flares for decoration and projectiles. You will fell like you were playing in the Doomsday Engine.

- 3D bloodspots for OpenGL users that can paint the ground and ceiling with the blood of your enemies.

- You can RIP AND TEAR an enemy if you kill him with punches while under effect of a berserk. (Also knows as Fatalities)

- If you shot an enemy so close, blood will splash on the screen.

- You can paint the chainsaw with blood.

A new balance of weapons and gameplay
All weapons and enemies gained a new balance. There are no more weapons that gets obsolete after you find new ones like in Vanila Doom. (Fists that gets outclassed by Chainsaw, Pistol that gets outclassed by the Chaingun, or Shotgun that gets outclassed by the SSG). Also, there are no more low-threat enemies. Gameplay is much harder and faster. In a short resume: You have more powerful weapons that can kill enemies twice as fast, but enemies have more powerful attacks and can kill you twice as fast too, creating the "Brutal Gameplay".
Here you can see a detailed list of what changes in the gameplay:

Spoiler: Weapons
The Player: All enemy attacks deals twice the damage to the player. So you must always keep yourself on your toes, and never let the guard down. Don't think about rushing into a corridor full of imps and zombiemen thinking that you can easily kill them all with your ssg without suffering a single scratch, or you will get raped. In compensation, the bullets limit is raised to 300~600, and by pressing "Q" at any moment with any weapon, you can kick enemies in a Duke Nukem style. The kick doesn't deals much damage, but will push enemies away, and give you a reload/fire/retreat time window.

Slot 1:
Fists are very deadly and extremely useful in Brutal Doom. The normal fire mode is a fast jab that deals minor damage, but it's good to kill zombies due it's speed. The alt fire is a slower but more powerful hook, that can even kill demons and imps with a single punch in the face, but it has a large delay. After you get the berserk pack and gain super strength, you can perform third person executions like in the Doom Comics (RIP AND TEAR mode), or just gib enemies away (Smash mode). Press the reload button to change execution modes.
Notes:
- Fists are silent, and can kill enemies without alerting the nearby ones. Use the alt fire when attacking a zombie or imp from behind, and you will perform a stealth execution.
- While under the effects of berserk, you can grab barrels, and throw them at enemies like grenades. Just punch a barrel to grab it. Also, you can use the alt-fire to drop the barrel in front of you, and set up barrel traps.

The Chainsaw deals twice as much damage than in Vanilla Doom, but it takes one second to start firing. It's a nice weapon to mow down large groups of imps or demons coming in front of you, but if you are going to take scattered small groups, use the fists with alt fire, because the chainsaw will make you stuck while you are slashing the target, turning you into a vulnerable target to others that are behind.



Slot 2:
The pea shooter is gone forever, and the Combat Rifle now takes it's place. I always wondered why does the player sprites carries a rifle, but you don't have it in-game, and the fact that zombies have rifle too, but you can't grab it after their deaths. Unlike the pistol that is a completely useless weapon, this one has a good fire rate, and it's the weapon with the best accuracy in the whole mod. Can easily kill zombies and even imps with one or two headshoots. A skilled player can even kill Mancubus and Hell Knights with headshoots from a long distance with it. Alt-fire allows you to aim down the sights, providing better accuracy, but killing some of the field of view. Needs to reload after 20 shoots.



Slot 3:
Don't you always wondered why does the Shotgun in Vanilla Doom fires 7 pellets per shoot, while the SSG fires 10 from each barrel, even if they use the same ammo? Yeah, that's pretty weird. But in Brutal Doom, the shotgun actually fires 10 pellets like the SSG does, and is more accurate. It's a nice weapon to take down imps, demons, cacodemons and lost souls from a safe distance. Needs to reload after 12 shoots.

The Super Shotgun now has a reason to be called "Super". It can deal double damage and turn enemies in a bloody mess if fired from point-blank range. To compensate this damage upgrade, it has a longer reload time.
The Alt Fire mode allows you to fire one barrel at time. It has bonus accuracy, but doesn't deals the extra damage at point-blank range.



Slot 4:
Minigun replaces the Chaingun. It fires 50% faster than the Vanilla Chaingun, but needs cool down for a few seconds before shooting again. Due this cool down, it's not suitable to kill single zombies or imps, but to mow down large groups, and suppress medium and large enemies. It has an alt-fire mode that will keep the barrels spinning and fire 50% faster than in the normal fire mode, and without needing to wait until the barrels stop rotating to fire again. But this mode has a large recoil, and will not allow you to move while doing it.



Slot 5:
Rocket Launcher Fires slower than the Vanilla's one, but each rocket deals 50% more damage to it's target. All enemies have Xdeath animations when killed by a rocket. It is supplied by a large rotatory 6 rounds barrel. Needs to reload after 6 shots.



Slot 6:
Plasma Gun still has the same fire rate, but now deals some splash damage, and is much better to kill large crowds of enemies. It has an alt fire mode that will overcharge and fires many projectiles at the same time (aka Plasma Shotgun). It deals almost as much damage as two rockets, but it requires a lot of time to make the weapon cool down. This fire mod is better used in situations when you are behind cover and under heavy fire, and needs to quickly leave the cover, shoot something, and get back to cover again before getting your ass kicked. Needs to reload after 100 shots.




Slot 7:
BFG9000 is still almost the same weapon, except by the fact that it's ball will deal double damage, and some minor splash damage.



Bloodier and Gorier! Gibs! Gibs everywhere! You can paint the walls, floor, and ceiling with blood.


Your head asplode! Almost every enemy (exept Cacodemon, Lost Soul, Demon, and Pain Elemental) have new hitboxes for their heads. You can perform headshots to deal more damage, and cause more brutal and bloody deaths. Shoot at heads to explode them, and see brains, teeth, eyes, and blood flying all over the place.


Amazing effects! Particles, flares, and even shadows! You will fell like you were playing in the Doomsday engine.


RIP AND TEAR!. After you find a Berserk pack, killing enemies with a punch will perform 3rd person executions just like in the Doom Comics. By doing such executions, you gain bonus health as a reward.