I cant decide between getting Dynasty warriors 6, Warriors Orochi 2 or Dynasty Warriors Gundam?

The first Dynasty Warriors Gundam was horrible. Barely qualified as playable, due to a terrible framerate. Later ones are ok, but still not up there with DW 3, 5, or 7, or Samurai Warriors 2.

Warriors Orochi 2 was pretty good, but at higher difficulties, it basically becomes just a question of who can get the first hit in, becasue you have to be able to 1-combo the bosses to survive.

DW6 was a drastic departure in gameplay from the previous games, pretty much copying the combo system mechanics wholecloth from Nighty-Nine Nights. Most fans hated it, because 1) If they wanted to play a game with that style, they'd just play NNN; 2) it was very momentum-based, so if you took a few hits, it became very hard to survive, even if you still had a lot of health; 3) It wasn't the DW they know and love. DW7 largely reverted back to the gameplay of the earlier DW games, but did keep a few of the innovations of DW6 that worked well, as well as adding in a weapon-switching system that basically takes the appeal of Warriors Orochi as well. The main complaint most had was that outside the Story Mode (which is much more fleshed out than in any other Koei Warriors game, but only 1-player), the fights tend to be pretty small and short.

i think you mean Dynasty warriors 7 if not then get 7, 6 sucks

How about buying & reading a book instead.

Read Animal Farm. From this you'll understand how power corrupts, how those at the top claim to support us, but when the chips are down they'll sell us for cannon fodder (soldiers going to war) and how the entire information network is designed to prevent humanity from progressing towards that which we are supposed to become. Or would you really rather just press buttons on an electronic game?

get the newest one aparently its a surprising improvement on a loosing streak