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