10 New Game Plus Modes That Changed EVERYTHING
4. Play A Massively Different Way - Metal Gear Solid
Upon finishing Metal Gear Solid for the first time, you'll be given one of two special items, depending on which of the two endings you managed to get. This comes in the form of either a bandanna that lets you have unlimited ammo, or a stealth suit that basically makes you invisible.
Finish the game a second time, with the different ending, and you'll not only get whichever item you missed, but also nab yourself a sweet tuxedo for Snake to skulk around in.
This encourages you to play through once regularly, once with whatever special item you unlocked, and then once with the other. Which can result in three massively different playthroughs, as the ammo upgrade makes you do a shoot-them-all Rambo run, whereas the stealth suit makes you the best spy of all time.
It adds some pretty massive replay value to the game, which is likely why later instalments of the series opted to give you similar unlockable loot after completing the game.