Hi, I bought a MBA and not a MBP because I already have an iMac at home for heavy duty stuff.. Although im going on vacation soon, and I wanted to be able to play some games on the plane. Games like Sims 3, Civilization 5, Roller Coaster tycoon and GTA. Could I play theses games on my Macbook Air? Or will it be incredibly slow? Also how fast while my battery die (its the 2013 MBA)???? ALSO, I spected up my mac to 8gb ram and 256 gb ssd (if it changes anything) Thanks in Advance!!!