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