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