ARGHHHH THE ALIENS!!!
Its a good game, i believe it is set in different parts of America in the 1950's. This game is funny, pretty much without trying...i mean the very start of the game the aliens land and think that cows are the dominat species on Earth!!!
But the main reason of the game is to find your predecessor (your clone) which crash landed on Earth and you must retrieve him before the humans find out to much about your alien race.
Also in human brains there is a small amount of DNA that will help the 'breakdown' of you alien clones. You when you kill a person you can take their brain and gain DNA.
There is a large number of unlockables in this, these are all weapons which you must buy using your collected DNA.
Also this game is not all faught on foot, you get you UFO which is equipt with a 'death ray' and you can unlock a beam which you can pick people to tank up with and you can throw them into the water!
And after you cause some terror across the town, dont think the humans will do nothing to stop this, they will bring in the army to the 'Majestic' (a secret organisation that know how to counteract against the alien invasion)
The weapons you get in this game are great, becaue they are so unrealistic! your first weapon is a 'Zap-o-Matic' which shoots a beam of lighting out then later you get a 'disintergrator' which turns people to ash. and a form of grenaide launcher which kills anything in its path.
All in all this is a good game, but like some games, is not really worth it after you beat it....