Kerbal Space Program 40% off at Steam. Also got a MASSIVE update.

[shortylickens]

Many UI elements tweaked. In game encyclopedia/manual which can be accessed anywhere.
64 bit and 32 bit modes have improved performance on all platforms.
Some minor changes in how things operate, but nothing drastic.

Basically the same thing, only better all around.

 

[shortylickens]

Oh, the downside is almost all of your 3rd party mods no longer function. Sorry.

 

[mizzou]

cool. I feel like the last big update made it less fun to get a rocket in the air. will have to try again!