Thread:204.184.215.2/@comment-4483810-20121017162150/@comment-4483810-20121017190837

No they are not only available if you pre-order the game, in my home country where i pre-ordered the game it's readable that you can play as all the aliens that is on the wiki including Gravattack, Wildvine and XLR8.

My sugest is that if you pre-order the game these aliens wil alredy be unluked when you first start the game.

And that thing with wildvine is probably a mistake on the website Gamestop.