So I played through Firewalker... It is really just a tech demo introducing the new vehicle. The missions are short and shallow and they don't add to the story or any of the characters. The driving mechanic is a million times better than the vehicle in the first ME but it is still not comfortably maneuverable. Going backwards is difficult. Targeting is wonky and you don't know you're taking damage until the thing catches fire and explodes. Dunno why BioWare has trouble with vehicles. If it was a pay download I wouldn't recommend Firewalker but since it's free, why not give it a try?
Has anyone tried continuing their career after beating the game by starting over with the same character? I tried and it promptly froze on me.
