We were lucky enough to be blessed with a shower of keys for Defcon this week: www.everybody-dies.com/
For those that haven't seen it, it's a kind of rts lite based around a strategic world map kind of like what you'd see in War Games and stuff like that.
When I say RTS lite, I mean that theres very few units, and theres no resource collection at all. You're assigned units at the start, and thats all you get. A bunch of silos that can either launch nukes or provide air defense, but not at the same time. Subs that can either launch nukes or take out ships, but not at the same time. Carriers that can either launch planes or take out subs, but again, not at the same time. Oh and fighter and bomber aircraft.
The games timed, so really dont go on for too long. The Defcon level starts at 5 and counts down to each level on a timer. At defcon 5 you can place units and do nowt else. Then defcon 4, radars active. Defcon 3, Can move units and engage boats and aircraft. Defcon2: Not really sure what changes here :) Defcon 1: you can nuke folks.
While you can play vs ai, its primarily a multiplayer game. The networking seems very solid, really easy to join and host games and theres a nice spectator mode too.
Visuals are very distinctive vector style, really striking. It all moves very fast and can look very impressive when things really kick off. Sound is superb, klaxons sound for defcon level changes, stuff like that.
It is flawed a bit. Unit selection is, as ever, a right pain in the tits. Unit movement speed can be a real pain, especially if you fucked up placement. If your fleets are in the wrong ocean, you're never going to be able to move them somewhere useful when the nukes start flying. Gameplay also often comes down to timing, which is fine as it goes, but can make it a bit chicken and egg.
Still, its a tenner, and ace fun. Well worth it.