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