This trainer has been made for Brink
It should support most game versions, tested with v1.0.22672.46967.
Also tested and working with the new update, v1.0.22696.46979.

Trainer download link:
Brink +3 trainer

The trainer has been made for the 32-bit version so I am not sure it is working on 64-bit. If the trainer is not working for you, the Cheat Engine table that I have made will still work. You can download the Cheat Engine table from here:
Brink CE table
http://forum.cheatengine.org/viewtopic.php?t=536451

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. Enable weapon cheats (you need to activate this option before you could use option 3 and 4)
3. Unlimited Ammo
4. No reload

NOTES:

All cheats are working for the human player only, AI is not affected.
Depending on your computer, it may take a few seconds to activate a cheat. Be patient.

Unlimited Health: Unlimited Health, hopefully keeping you alive.

Enable weapon cheats: You need to enable this option before you could use the unlimited ammo or no reload cheat.

Unlimited Ammo: Never run out of ammo. (activate option 2 first)

No reload: You don't have to reload your gun. (activate option 2 first)

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