i am thinking of buying the game and have some questions. Hi guys, i am thinking of buying this game but i wonder how is the learning curve? am i gonna get blown up if i try to play it online? is there limited worthy strats i should learn and use or can i just play in a way i like or would it be impossible to win without using pre-determined strategies. and last, there are 2 things in purch. page, one is starcraft 2 wings of liberity and starcraft 2 heart of the swarm, which one i should buy in order to play this game online? what is the diff between them (i just guess campaings would be diff but i have no solid idea)