I find KSP very hard to get out of space, So instead of normal things I make it do cool loops and such
(Good thing about the game is that it is fully functioning in ubuntu)
Also I'm taking courses in IT - Data, meaning I will get to know HTML/CSS/JS/PHP/MySQL/Linux/Windows/Android etcetc..
3D printers can print guns, can you do that with the one you have available?? Would be super cool if you could 
If you're interested in super cheap games, check out humblebundle.com now and then, they sell tons of games super cheap. I paid 1€ for like 7 games. 1-2 weeks ago they sold mirrors edge BF3 burnout paradise sims 3 etc, for 4.6€ or $ cant remember. I bought the last bundle (weekly) which contained; War of the roses, Warlock - master of the arcane, the showdown effect, Leviathan Warships, Europa Universalis III Dungeonland. It's plenty for so little. If you added like 3€ you'd get 2 other more expensive games. And it all goes to charity or to humblebundle to keep giving cheap games. Also, on sale on steam there's a game called Gnomoria I'd suggest, and Euro Truck Simulator 2 for some relaxation, it's a really chill game.
If anyone wants to add me on Steam; spore_lol_spore, on origin; CenoX5 (Me and my cousin when playing BF3 he calls himself GenoX5, so people mix us up^^)
If anyone wants something hard to beat, or rather stimulating for the brain; Portal, 1 and 2, they're great games.
Well, KSP is just realistic. You should low your speed before you can dig in athmosphere, and, because of this, you should corretly calculate fuel mass before you start the mission (fuel mass in orbital vessel must be enough to lower its speed in bounds of 1,25-1,5 km/sec. i.e., from 2250m/s to about 1100m/s). Then your vessel will start to loose height and falls on planet via ballistic trajectory.
As for 3D-printers - yes, we can create guns, but this is not a good guns. Well, it's not serious - it's one-timed and very fragile, you can't be trusted in its barrel. Also after a first shot plastic from barrel insides will burned out, you can't shot again.
3D-printers indeed a cool thing, but it's cool for fast-prototyping, or for creating arts, for example, anime action figures.
We can built other guns using a processing machinery, that's much better choice. Gauss-rifle, powered with condensators from PC power blocks, EMP mine, based on tesla coil and cell phone battery, microwave gun (big reflector+mangetron from big microwave used in shaurma (kebab) fastfood)... Also, classic SMG for 9mm Makarov shell is much better choice than 3D-snotted gun. Or, to be absolutelly correct - we
could built, but our lathe was broken two days ago because of one idiot.

I'm not interested in cheap games - I downloading games from torrents, check them, and then buy games if I like it. For example, I did that with WH40k series (except the "SpaceMarine", I not bought it yet), or selected Tomb Raider games (except the last, I don't like how Lara in last TombRaider looks), or Armed Assault (I'm its fan since the first Operation Flashpoint

) Also, I'll buy KSP when mexican guys will finish it.