IM CONFUSED ABOUT BRINK VIDEO GAME PLEASE HELP!!!!!!!!!!!!!!!!!?

So when I started campaign I thought it was all other people from online. But now I'm starting to think its just the computer because they all have like fake names like "Matt" or "Kyle", BUT it also searches for host and has to find game sessions which point back to online but no1 has mics which leads me towards computer. WHICH ONE IS IT AND WHY IT THE PLAYER NAMES LIKE THAT AND NOT LIKE YOU SEE ON ONLINE>??????????????????????/