Full list of all 27 Duke Nukem 3D: 20th Anniversary World Tour achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Burn 50 bad guys to death.
Kill a Firefly Trooper while it's flying small.
Kill 10 bad guys in 10 seconds while on steroids.
Listen to Developer Commentary (Use at least one trigger).
Find any secret level.
Finish any level on "Damn, I'm Good" difficulty.
Use the hookah in High Times.
Find Sam in "Mirage Barrage".
Find Luke in the Level "Lunar Reactor".
Find the Doomguy in the Level "Death Row".
Kill every enemy on a level.
Kill 1000 enemies.
Kill 5 bad guys with one shot.
Finish the "Hollywood Holocaust" level in under 3 minutes.
Find 70 secret areas.
Step in a pile of excrement.
Step on 40 enemies after using the Shrinker on them.
Complete "Alien World Order" on any difficulty.
Complete "The Birth" on any difficulty.
Complete "Shrapnel City" on any difficulty.
Complete "Lunar Apocalypse" on any difficulty.
Carry all weapons with ammo at once.
Use the Incinerator
Complete "L.A. Meltdown" on any difficulty.
Use a cheat code.
Tip an exotic dancer.
Find a secret area.