Quake and Doom can never be overstated as titans in the gaming industry, especially the First Person Shooter genre. So, since both of them represent the height of their respective periods of graphics and gameplay, why not shove them both together and get the best of both worlds? Sounds testy, right? Well, not if the ones modding it know what they're doing. Well, they did know, obviously, and what we get is Doom levels with Quake gameplay and enemies from both!
Does it all work out together perfectly? Not exactly, but it certainly gives you all of the good, gory gameplay parts you would want. The starter Quake shotgun still has its meaty feel when you fire it at your enemies and get a decent spread. You can use the Super Shotgun (double-barrel shotgun) on both enemies from Doom and Quake together! When you start the game, you can choose to have either one or both, and you want both!
There is nothing more chaotic than a whole batch of enemies, monsters and demons coming at you with different AI and tactics to attack! Pinkies are coming to eat you while the Fiend is jumping at you even FASTER! With zombies throwing their meat and imps throwing slower and longer range fireballs with gunmen coming at you with different gunfire rates, it's a whole new ball game! Does this get rather difficult? Yes, yes it does.
One big problem with this whole concept is that the ammo and monster ratio of the two games are entirely different. Quake came out back in the mid-90's, when computers couldn't handle quite as much as they can now, so monsters were limited in their numbers. This was not as true for Doom. Even though it was a smaller game, the monsters did not take up as much data, so you can be fighting far more. The guns needed more ammo in Doom, but now in QDoom, they have the weapons from Quake with less ammo but you are expected to take down far more. This means you need to start using your little hatchet a lot more in the starting levels, but you don't get as many weapons unless you get all of he secrets. So, basically, you need to be badass as Doomguy while being as strategic as Ranger. Shape up, Doom Marine!
There are parts of this where you should have been able to jump into secrets, but were unable to jump in Doom. Well, now that you have the Quake jump ability, they flat out WALL OFF these areas. Darn, it was a good thought! A lot of these that don't affect the overall gameplay, and some of them let you jump, but don't count on it. Being able to do all of this while fighting the Cyberdemon sounds like an amazing experience, so let's all wait anxiously for the Shores of Hell mod.
The only episode that is available, at the time of writing this, is the greatest episode, Knee Deep in the Dead. This entire episode was beautifully rendered as a Quake episode and playing through to the Bruiser Brothers is a joy once again! This is one of the single greatest Quake mods, making it a Doom mod by default! You can't ask for greatness like this and they offer the first episode for free. It says a lot that these modders are doing this for nothing and QDoom is planned to have more episodes in the future! Planet Virtua needs Doom Marines to take care of demon problems that may or may not exist, and this is just an awesome way to train your shotgun aim! Virtua Bang!