I have to say I'm honestly surprised the current average mark for this excellent movie is so low, and probably some reviews are so negative.
In a way it's understandable actually, because if many people expected it to be a mega-budget Hollywood blockbuster with a tight plot, dialogs with depth (real or clichéd) and an all-star cast (independence day, Armageddon etc), well then, this movie would definitely be a disappointment.
Well, some people might have been looking for those rare gems, movies with style and a great story but for whatever reason ignored by the establishment (Cube, Cypher, Donnie Darko when it went straight to video because of 9/11 and an airplane crash, despite being one of the best movies ever made).... and again they were in for a disappointment.
So, you might think, why does this lunatic gave it an 8 then? That's actually quite simple, this is a B-movie, shamelessly so, and as such it succeeds in its intent and entertains to no end.
From the very opening, a quiet evening in rednecks-ville with booze, guns and alien ships crashing behind the barn, we're immediately reminded of classic B-movies such as Killer Clowns from Outer Space, Wild Zero, or maybe the pulp fiction that inspired many Tarantino movies. However, while Tarantino tries to invest his silly, gory movies with a serious background that rarely fits, Alien Opponent is a tongue-in-cheek gore fest that entertains us with action, blood, corny dialogs and bizarre deaths all extremely funny.
The movie, as long as a silly, gory B-movie suits your tastes, flashes by in an instant, never boring and always enjoyable. For a bit of mindless fun and gratuitous, silly violence, this movie is a real gem, and in my opinion much more fun than pretentious Hollywood efforts like the recent Sherlock Holmes movie, check it out.
PS I recently watched it again and I had to change the score to a ten. Stupid movie, yes, but really funny. I still think many people just don't get that it's meant to be cheesy and silly. That's what great B-movies are.