Using a trainer for the Modern Warfare 2 campaign can unlock various modifiers, such as:
FLiNG trainers are small, specialized executable programs designed to modify a game’s behavior while it is running. Unlike cheats that might alter game files or cause corruption, a trainer acts as a "trainer" (similar to a gym trainer) for your game, manipulating data in real-time. call of duty modern warfare 2 trainer fling free
Reviews from users on platforms like FLiNG Trainer and community discussions on Reddit generally highlight: Using a trainer for the Modern Warfare 2