The quickness of a Flashgame but the strategy of a full-on wargame.

Pros:
-small game >> quick to download and not much space used.
-simple to learn and gets you in the action fast.
-several different game types: Elimination, King-of-the-Hill, Gold-Mine, Target-Capture, Debt-Collector and a few others up to 4 players at a time.
-several skirmish maps, single player or multi-player (would be excellent on a game system).
-Decent Storyline.
-Decent music.
-several Steam Achievements as well as in-game rewards that give you quick cash when you need it.
-general technology upgrade sysem
-Strategy is simple, yet deep.
-Difficulty setting matters; not only is the AI stronger but they're smarter. The higher the difficulty, the higher the rewards.

Cons:
-If you're use to over-complex strategy games this will seem overly simple (possibly even boring).
-As far as I know you cannot play as the alien race, but maybe I haven't gotten that far yet.
-though planets do have a population, it is used only as a form of limiting currency in warfare. There is no real economic strategy except "make money >> spend it. Build population >> spend/send it."

All this said:
Nice, Quick, Simple yet Challenging.
7/10

This is simply a must have game for strategy lowers.

I like difficult games but this is one of those cheap difficulty types. The AI doesnt get smarter they just give them OP production etc. Get's frustrating very quickly and very repeitive due to having to replay and grind previous missions to get minor upgrades. It's worth $0.99 but not much more than that.