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