Here is the full list of all 28 Duke Nukem 3D: 20th Anniversary Edition World Tour trophies - there are 10 bronze, 11 silver, 6 gold and 1 platinum.
Completed all trophies for the game!
Kill 1000 enemies.
Find 70 secret areas.
Finish a secret level.
Kill a Firefly Trooper while it's flying small.
Use the hookah in "High Times".
Step on 40 enemies after using the Shrinker on them.
Step in a pile of excrement.
Complete "The Birth" on any difficulty.
Finish the "Hollywood Holocaust" level in under 3 minutes.
Tip an exotic dancer.
Find the Doomguy in the Level "Death Row".
Find Luke in the Level "Lunar Reactor".
Find Sam in "Mirage Barrage".
Burn 50 bad guys to death.
Finish any level on "Damn, I'm Good" difficulty.
Complete "Alien World Order" on any difficulty.
Listen to Developer Commentary (Use at least one trigger).
Complete "Shrapnel City" on any difficulty.
Kill every enemy on a level.
Kill 10 bad guys in 10 seconds while on steroids.
Complete "Lunar Apocalypse" on any difficulty.
Use the Incinerator.
Find a secret area.
Kill 5 bad guys with one shot.
Carry all weapons with ammo at once.
Complete "L.A. Meltdown" on any difficulty.
Use a cheat code.