I was kinda surprised Critters 4 didn't make the list, but I guess they already had a shitty-horror-series-goes-to-space-with-its-fourth-entry movie in there.
Then again, if Critters 4 had had a different, vaguely intimidating monster as its lead villain, I actually thought it would've been a half-decent low-budget movie. Plus, it's got Brad Dourif for an extra Alien bonus.