Real "Huntsman" Survival Knife: $29
Virtual "Huntsman" Survival Knife: $299 :D

Revolution Ace is definitely NOT one of the best shooters in its genre. It has frame rate problems, the bullets blend in with the background, and generally it's a bit of a mess. But somehow when I was playing it, something made me look past all that and I really did have a good time. It has an upgrade system that definitely helps with the sense of progression, a fun but challenging boss at the end of each stage, and a neat system of air bullets vs ground bullets, forcing you to pick between whether you're shooting in the background or in the foreground.

But by far the best part of the game is the multiplayer. It takes all the problems I mentioned and kinda blurs them out of your mind, because, at least for me, I was more focused on playing a game with my friend and the issues became less glaring. There's also a cool multiplayer versus mode, which I've never seen implimented into a top-down shooter before. It works pretty well.

As a whole, Revolution Ace was like a fat guy sitting in front of you at a playoff game. It's annoying at first, sure, but if you can look past the problems, you have a great game in front of you. It's a fun experience, and you should definitely consider picking it up if you have some friends to play it with.

Pros
Upgrades system
Interactive environments
Interesting air vs ground mechanics
Great multiplayer

Cons
Frame rate issues
Bullets tend to blend in with the background
Lasts maybe a bit longer than it needs to

I like games with a retro feeling, though I do not play originals because I think they were great at their time but fall back compared with modern retro games. Biodrone Battle took my interest because Paradroid was one of my favorite games and I think this is a nice remake. It it faster, got more action (as far as I remember) but also has its moments of tension when you got chased by a droid, escape into another room, hide and watch your confused haunter. Graphics is somewhat basic or retro-like but lights and explosions give a tense ambience.

The Game Really Suck But This Game Gives Cards So I Like It :D