I can't understand all the negative reviews for this game. There is a free demo of this game. All I can do about guys screaming how bad this game tends to be, is to laugh about you being so m*therf*ck*ng stupid and / or having too much money, so you think you don't have to read the despricption and / or try the demo before buying. Do humanity a favour and please never make childs guys.
Anyway ... on to the review of this game:
This is a nice and mindless arcade style top-down shooter. It features nice graphics, enjoyable sound-effects and a stomping soundtrack.
You shouldn't expect anything from this game but aiming with your mouse and shooting. I mean LITERALLY THAT IS ALL THERE IS TO DO! You can't even move because in the first installment of the series as you are in sitting with your charakter in a tower that is fixed in the landscape of each level.
In the second and third part of the game you can even walk around, what makes the game maybe more enjoyable but it also makes it harder as the difficulty setting of the levels is risen up by adding even more enemies and a casual boss-fight here and there. Apart from that each game at heart is pretty much the same:
Each level consists of only one screen. There are rocks (that can be shot) and explosive barrels (that of course can be shot) and most of all there are hundreds of enemies (that should be shot) in each level coming at you in waveforms trying to get to you or to shoot at you to destroy you.
All you can do to prevent them from doing so is holding down your mousebutton and shoot like hell.
The game has three characters to choose from, each one plays a little different as each character has seperate tech-trees which can be upgraded by spending XP you get from killing enemies. Also from time to time there are cyber skeletons running around on the battlefield which when shot leave some extras behind, that once collected (by - you guessed it - shooting at them) can be anything from weapons, shields, smartbombs and so on, to give you a little advantage over the massive agressing hordes of enemies storming onwards.
This game is a lot of fun to me. I already owned it before steam was even there and if you enjoy the demo you might give it a try as you maybe will enjoy it too. Just don't expect anything from this game that it does not even promise or tend to be.
I bought all three installments of the series in a sale and you should most wisely do the same. Though the game offers a decent amount of replayability with it's different characters and difficulty settings, yet after all this years i think it's a little overpriced at it's normal price.
So for now I recommend you to try and play the demo until the next discount is on and then get the full version of the game !!!