Everybody wants to play Achievement
Everybody wants to play10
Play Online with all characters at least once (including Wallace Wells)
Join or create a match for either public or private (if you have friends) via the Network Game option. You only need to use Scott, Ramona, Kim, Stills and Wallace for this acievement (Knives doesn't count). Again you only need to do one level, so use maxed characters on Average Joe difficulty, World 1-1 (Frozen Suburbs) or World 3 (The Main Stage) and play through until the end of the stage.
Use This Thread to find people to play with!