Think of it as a remote control for the game's internal engine. With the press of a hotkey (like F1, F2, etc.), you can tell the game, "The player currently has 100 health," to instead read, "The player currently has infinite health."
For Crysis 3 Remastered , Fling remains the top recommendation due to the "Save/Load Position" feature—a rarity. Crysis 3 Remastered Trainer Fling