Metal Gear Solid V: 20 Things You Didn't Know You Could Do

4. Kill Guards By Leaving Them Face Down In Water

Kojima's clearly been playing Heavy Rain, as if you want to get your own Origami Killer vibe on and dispatch an enemy by drowning them in rainwater, you can. Although it's fairly useless in practice and serves more to remind you how Hideo's team think of everything, leaving guards face-down in any amount of water will eventually drown them, the same as in MGS 3. It's only really useful if you want to leave a target in such a predicament and then worry about your own exfiltration, as they'll die on your way to the landing zone - just be sure you don't leave any rescue targets in a similar scenario.