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