This trainer has been made for Duke Nukem Forever.
It should support most game versions, tested with v1.0.

Trainer download link:
Duke Nukem Forever +3 trainer
Duke Nukem Forever +3 CETRAINER

First run the trainer.
Then run the game. (You can start the game with it's own icon or You can use the Start game button in the trainer.)
Hit number keys on the numerical keyboard to turn options on/off. Make sure that NumLock is active.
You can also use the checkboxes to enable/disable the options.

There are 3 options in this trainer:

1. Unlimited Health
2. Unlimited Ammo
3. No reload

NOTES:

Unlimited Health: Always have max health.

Unlimited Ammo: Unlimited ammo, supposedly for all weapons.

No reload: You don't have to reload your guns.

What is a CETRAINER file? The answer is here:
http://www.szemelyesintegracio.hu/cheats/41-game-hacking-articles/340-whats-a-cetrainer

Recommended for those who are afraid of viruses and prefering downloading small files.

You can send Your comments and bugreports to Ezt a címet a spamrobotok ellen védjük. Engedélyezze a Javascript használatát, hogy megtekinthesse.

Some information about virus reports for trainers generally. Read it before You post something about some virus.
http://szemelyesintegracio.hu/cheats/41-game-hacking-articles/212-trainers-and-anti-vir-softwares