I usually end up getting cornered when other players bugger off, one game on Kino I went to revive a downed player on the stage and another player who was right next to him runs off leaving me to get over-run.
Players who have no concept Team-work and Tactics is another thing that ends up screwing me up, I don't get why people play online if they don't know how to work as a team.
Also noobs, some guy died over 30 times in one game while me and the other two players only died around ten times or less.
High Scores
Kino Der Toten (Solo) - 24
Kino Der Toten (Multiplayer) - 25
Five (Multiplayer) - 21