I did not come up with this idea, but I still want to explain this. It would be really cool if bungie added a horde gamemode to destiny. This would be where you can play on a map and enemies of the different planets would come at you in waves, and you would see how many you survive. You would be able to use the guns you got, or pick up special ones that bosses drop. You could either have a private or matchmaking game. At the end you receive better loot, on the wave you got to [spoiler]like wave 100 gives you an exotic[/spoiler] . You also would be able to buy legendaries from the horde guy in the tower.
Thanks for reading this, and please don't hate!
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Isn't all PvE in destiny already horde mode. . .