X-com Enforcer has a reputation of being bad. A bad shooter, a bad use of the X-com IP, and aging badly. However, for this review I will assume you've got it in the X-com Complete Pack rather than spending money on it (Please don't do that, it's not worth 5 Euro/Dollar/monopoly monies in my opinion)
As such, I will actually recommend you play it, after all, you have it from the complete pack so the only thing you can lose out on is time.
It has a lot of bad, and yes, the reputation is kind of deserved. After X-com Interceptor has you beating aliens in space, there really wasn't much else to do in the X-com story. So we're not really getting a story here.
The story is: You're a robot. You wake up. Aliens are attacking. Go kill aliens. And...That's about it. There does seem to be an idea of a story in there but it's kinda hidden.
Simple, but it works. It's slow to start, but you'll eventually unlock bigger guns, the ability to go faster than many projectiles and even more guns, and even more big guns. Did I mention you go fast and have guns? I think I did. Taken as a continuation of the X-com franchise, it fails. Hard. But if you take it as just an X-com based shooter you get as a bonus with the rest of the X-com pack it is less painful, and at times it becomes fun. After a while it becomes an amusing shooter where you slaughter entire hordes of aliens while flying from one end of the room to the other launching spinning disks with blades attached to them. There's the standard (For the time) hidden secrets to find, big levels in which you can explore a whole lot, and a lot of aliens to shoot at.
It also takes a little from bullet hell games, as your bonus points(And I think maybe super speed too) resets when you get hit. You won't die from just one quick hit, but you will find yourself actually trying to dodge things so you can keep going fast.
It doesn't make the game great. But being completely honest, I wouldn't say it's awful and bad either. Don't take it as a hardcore serious game, take it as a casual amusing shooter narrated by an amusing scientist who seems to enjoy watching his creation(You) wreck the alien invaders.
It's not good, but I wouldn't call it bad either. And since it's in the X-com pack you may as well give it a go.
At the least, play a few levels before you decide whether it sucks or not. It might surprise you