How can I play Alien Swarm with only one friend and have the AI control the other two characters?
I find it very difficult to play with only 2 characters, and I'd like to fill the empty slots with AI.
I know it must be possible somehow.
EDIT: The accepted answer works, but the bots don't do anything more than firing (no healing, no welding, nothing). I have to control them to do anything more than just firing.
Does anybody know how to solve this?