Here lies an FPS that was largely forgotten - and for good reason. Because it's just a bad game, from level design to shooting. If you want a fix of 40K - get Mechanicus instead, also now on GOG. And if you want a good 40K FPS - well that's just too bad. P.S: It's quiet.
The sourceport is very nice on the surface, but as of now there are quite a few bugs and inconsistencies with the original that make me prefer NBlood or BloodGDX (available for free) to this one, for example: Fire damage being broken (most obvious with spray-can and bloated butchers) Floating gibs. Some sound bugs (the most often being cultists using sounds from the helpless survivors). Fixing run glitch breaking cultist TNT behavior. Inconsistent jumping (especially when getting out of water). Cultists being way less dangerous (very noticeable on extra crispy, lower damage and reaction time). There are also reports of crashing and multiplayer barely working, or not at all, as well as other bugs. I recommend waiting until the port is well done.
For anyone wondering, you can turn all the visual fluff off. Other than that, it's a pretty damn smooth game with 3 playable characters, so if you like beat-em-ups, this game will satisfy your need to punch a lot of people in the face. The only real flaw is the lack of online multiplayer.
I guess the best way to sum up this whole game would be thus: The developers tried emulating old FPS games without understanding what made them so good. Again. The first and biggest problem of the game is the engine - it's Unity. Optimized extremely poorly for how the game looks. The movement feels very floaty, and there's something off about strafing. Not sure how to describe it - moving forward and strafing at the same time feels very stuttery. The spells seem like an afterthought - since upgrading your guns (absolutely necessary for some of them) share the same upgrade points as buying spells - spells are often left out, not to mention they aren't all that strong. Except the freeze, freeze is your best friend. The start of the game until you get at least the shotgun is extremely slow, as your handgun is weak, and the staff uses your mana and eats through it pretty fast. Pretty much all enemies until then can be killed by throwing your dagger, as it does very high damage on throw. Even after you get the heavier-hitting guns you constantly feel like there isn't quite enough ammo - making those ammunition perks and capacity upgrades a priority. The music is fairly forgettable for the most part. It's not bad, but it's not something I'd put on my playlist either. The automap is just not there. Sure, there's a minimap in the top-left, except it's worthless. The range is abysmal, and it doesn't even show doors on it, or which colour they are. The difficulties are not properly balanced at all. normal is far too easy, and hard is far too punishing. There needs to be something in-between. Well, at least blowing enemies to bits is somewhat satisfying. Is the game worth your money? If you really enjoy FPS games like this one, and if you have a higher-end PC to play it on, maybe. But I'd honestly recommend just replaying some of the classics instead - Doom, Quake, Blood and others.
The greatest space dogfighting sim that has never been topped before or after, with its sequel being the sole exception. Great gameplay, visuals, controls and story stand the test of time, and any technical problems this game or its sequel may have are ironed out by FreespaceOpen, which also features a lot of extremely entertaining mods and fan-made continuations to the second war, such as Derelict and Inferno; as well as great free standalone games made on the engine like Diaspora. Check Freespace out together with its sequel, you will not regret it. One of the absolute classics from the golden age of PC gaming.