In the context of PC gaming, a "trainer" is a third-party memory editor. Unlike a full conversion mod, a trainer runs alongside GTA IV, injecting code into the RAM to alter specific values.
Disclaimer: Modding your game may violate Rockstar's EULA. Use this trainer solely for offline, single-player enjoyment. The author is not responsible for corrupted save files or narrative confusion. gta iv trainer 1.2.0.43
SupermanMode=1 CarGodMode=1 NeverWanted=1 PedestrianDensity=0 In the context of PC gaming, a "trainer"
Always back up your GTAIV folder before installing trainers. In the context of PC gaming