From the start, I'm marking this as an arcade game, so I'll be a little more generous than I would of a full retail game. The standard price is 800 msp, but I got it on sale for 160 and honestly think it would've been worth the full price.
Right off the bat the game introduces itself with some humour and simple yet informative opening cutscene detailing the world of Greed Corp, a trend it follows throughout.
Gameplay: Fairly straightforward in this regard, Greed Corp runs of a standard hexagon panel system. You can build tihngs on panels you control and send walkers around to capture nearby panels. The real thing to make Greed Corp stand out is the destructible terrain, as each panel will slowly sink into the mist either by being harvest for resources, or shot at by cannons. In this regard games often boil down to isolated islands with cannons firing and carriers transporting troops in order to attack. The real fun lies in the strategies you'll have to pull, as there's no telling how your enemy might respond.
The single player campaign offers plenty of missions, and the achievements provide you some alternative methods of playing, encouraging walker rushes, cannon abuses, and other such amusing strategies.
The multiplayer aspect is pretty much dead, but if you've got a friend to bring with you for some light entertainment, that's where Greed Corp really stands up.
Single Player: 7
Graphics: There isn't much to be said for the graphics. They look perfectly fine and you won't notice any blocky textures or lacking poly-models. That said, the animations are limited at best outside of the two startup movies. Still, not disappointing by any standards. You'll see carriers fly over and cannons firing, but the walkers themselves just teleport from panel to panel. Probably for the best too, as it might've made turns take too long.
Overall Graphics: 8
Animation Presentation: 7
Sound: The music is one of the more interesting points of the game, as it's all performed by an actual band and recorded. What should be noted is that it's not the kind of guitar and drum based music you might be used to, but rather more like a stage band, with brass instruments and piano. Like all music it really comes down to a matter of taste, but I personally found it quite enjoyable, and a welcome break from the daily assault your ears might take from FPS games.
Sound Effects: 8
Overall I'm giving it a 4 star rating, It's a great little game and worthy investment, but it doesn't stand up to some of the best arcade games out there. If you're a fan of strategy games, go out and give it a shot. It's available on the PS3 and Steam as well if you'd prefer a different medium.
If you're really not that in to turn based strategy games, it's well worth a look, and probably more likely to score a 3 star rating in that regard for general appeal.