Capsized - a really beautifully weird looking shooter just unlocked with 10% discount. $8.99
I totally dig that art style
just watch this vid from the devs: http://www.youtube.com/watch?v=FDZQrrCpaeA&feature=player_embedded
And Sol Survivor is on 4.99 (50%) all week long.
Looks nice for Tower Defense game.
Am playing Capsized demo and can say that it is just as good as it looks.
Despite high system requirements, game is old computer friendly or at least the first level of the demo is old computer friendly but should note that your monitor needs to be able to handle 1280x720 as it's the lowest selectable resolution.
Knights of Honor is on sale at gamersgate for 2.50 if you guys haven't played it, its a RTS, which you can pause at will, takes place on the usual map of europe, and is one of the funnest games I have played, but, of course its my type of game. It would be a definite insta buy for me on GOG. If you like eruopa universalis, but, wanted something a little simpler, Knights of Honor is a good fit (easy to understand), not as many territories as EU and you can actually conquer the whole map.
As far as steam goes, though I'm not a fanboy, they do have good deals, and if you never played Mount and Blade, I would definetly give it a spin this week!
Have been KoH as well and can say that it's very similar to the Total War series but smaller in scope and simplified. Decent game for $2.50.