Complete "The Birth" on any difficulty or in co-op.
Step in a pile of excrement.
Complete "Shrapnel City" on any difficulty or in co-op.
Earn respect and get 500 total kills in ranked Dukematch games (Online).
Get 250 total kills in ranked Dukematch games (Online).
Get 100 total kills in ranked Dukematch games (Online).
Complete "Lunar Apocalypse" on any difficulty or in co-op.
Find 70 secret areas.
Step on 40 enemies after using the Shrinker on them.
Complete "L.A. Meltdown" on any difficulty or in co-op.
Tip an exotic dancer.
Finish the "Hollywood Holocaust" level in under 3 minutes.