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