How do you perform the combo attacks?

[jobob]

Is it multiplayer only? Can you do it in single player? I can't get one to fire for the life of me.

TIA.

[Pizza Time]

I may be wrong, but it looks like there is a bar on your character portrait that needs to fill up, and if you press b on an ally character, you should be able to perform one. I've done some by myself and it seems to wrok fine.

[jobob]

Okay, thanks... I wasn't seeing the bar. Looks like you have to get 1/3 of it filled before you can do your own special finisher, and the whole thing filled before you can do the team up. If you use your finisher, you lose what you have built up (that was my problem)

Seems like it takes 6 melee hits to fill it completely.