This is precisely how to *NOT* make a game about killing zombies on a spaceship.
Never mind plot; even if the plot for this yarn was excellent (which it is not) I could not recommend it, because the gameplay is just plain awful.
Enter room. Trigger zombies. Shoot zombie heads until they're dead, or you're dead. This sounded great, in a Painkiller-esque sort of way... until I actually played it.
There is hardly any mobility, because the fights are almost always inside very short corridors or other zones and your character cannot jump over stuff that an 80-year-old grandmother with the flu could. Yes, that's right, kids, it is 2014, and somebody thought a FPS WITHOUT JUMPING OR ANY REAL USE OF THE THIRD DIMENSION WAS GOOD GAME DESIGN.
This is not even Quake; this is Doom, badly done, with modern-ish graphics. It's not as fun as Doom, though.
Then let's talk about the guns and approach to game-balance. Guns go bang. Zombies get tougher. Upgrade guns every level, so that guns still hurt zombies.
The magical upgrade system for guns between levels (because, gosh, pacing weapons availability throughout the story would take actual game-design skill) is lame and makes this feel like a title that was originally intending to be F2P, but failed to find an investor. Especially the "gold" bit- that's a classic bit of F2P design (gold would normally cost Real Money, kids) but It is absolutely atrocious game design to need multiple resources in a SP campaign. Seriously- if you don't want players to have gun X until Y point... don't give the players gun X. Not real complicated.
But, to add insult to injury, the gun choices are perversely bad- not "so bad it's good", or "bad because it's part of a purposeful attempt to talk about an Idea" but bad out of sheer lazy programming and poor attention to detail.
Pistols might vary hugely in total DPS delievered per bullet fired... but the two pistols I've found thus far? They have exactly as many starting bullets. So, hmm, which one am I going to pick? The one that will do 4000% damage for all shots fired, or the one that does 3000%?
Seriously? Whoever designed this couldn't be bothered to get balance even roughly done, or differentiate weapons correctly?
The list of these kinds of good-god-why mistakes is terribly long.
How about a UI where it took many random button presses to figure out how to merely switch guns before a mission? How about the game awarding upgrades to weapons I didn't even have equipped?
How about having a "grenade" button that, instead of instantly throwing a grenade, does the same thing as pressing the Select Grenade key?
How about a plot so lame and incoherently written that I could care less?
How about playing a female character, and hearing male breathing the first time I used the Sprint feature?
How about "crouching" so low you'd have to crawl IRL?
How about the transition from standing to crouching having absolutely zero purpose in the game at all? No accuracy boost, no stealthiness, nothin'- it's just a gimpy way to move around.
Lastly... the graphics are really sub-par. Each element is OK, in a boring, done-that-been-there fake-looking High Tech kind of way. The zombies aren't terrible or exciting, although they really don't make any sense at all- I'm on some high-tech spacecraft, there are no trees... so, uh, where did all those chainsaws come from???
That said, the environments and level designs are very lousy. They aren't invested with any emotional involvement and the vast majority of the locations look exactly the same; until I got to the D-Tox room, I was pretty much just staring at the same bland sci-fi-ish corridors over and over, with heavy use of colored lighting instead of genuine attempts to create interesting spaces.
Anyhow... if the gameplay wasn't terrible, I could have let the lousy use of art assets go; this wasn't a AAA title and I was expecting gameplay, not graphics, to be the show. But for the record, it's not done well; the art assets are just fine, but the level designs are terrible and there is never a sense of Place about the vast majority of the ship, which makes the fact that gameplay consists mainly of doing the same encounters with the same zombie hordes, over and over again, that much more boring.
Could this game be fixed? Somewhat. Issues with the UI, the concepts of balance for the weapons, etc., could be addressed. The major issues are with the level designs, not allowing jumping in general, and the lousy plot; these things aren't so easily addressed. Anyhow, I hope that the developers read this and, should they get the opportunity to ever make another game, take this critique very seriously- I do not mind if your levels aren't AAA-looking in screenshots, but you'd darn well better build a game that's actually fun, if you want to avoid a diatribe like this one from Steam raters and reviewers alike.