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