Today Valve released the online stats for its zombie co-op title Left 4 Dead and to sum things up the numbers are about as pretty as an exploding Boomer.
Only 0.6% of all players have completed the "stomach Upset" achievement, which requires the entire team be untouched by vomit for and entire campaign. Even worse, only 0.4% of teams were able to kill 1,000 Infected with a mounted machine gun, thereby keeping the "Red Mist" challenge out of the hands of 99.4% of players. Sad.
Update (Ed-note: these stats are for the PC version, not the 360 version of Left 4 Dead) Sorry!