
Metal Gear Solid Delta: Snake Eater brings back iconic villains from the original version, and killing one of them early will help you unlock an additional trophy in the game.
The villain we are talking about here is Ocelot, who has a strange and unique easter egg around him. If you go against the predicted script, the right way to deal with him is to knock him down permanently after he gets unconscious. But you can create an alternate timeline (of sorts) by dealing differently with Ocelot.