When Halo1 was real hot, we used to do something called “the pillar battle.” Basically in the first snow level in H1, “assault on the control room” there is a wide open section with many many enemies, meant for you to burn through them with a Warthog. Right after that the map funnels you do a tiny cliff side that winds its way down and then you go through this pillar gate that is meant to gate off the warthog from being used in the rest of the level.
Well, what the group of gamers I talked to online about Halo would do was go through that entire first section Aggroing ALL the enemies with the warthog, but not killing any of them. Then you race down the cliff and through the gate thing…. and ALLLL the AI enemies in the previous area and that area combine and you get this INSANE gigantic shit show of a battle that will tank your Xbox to 5fps.
It was so dang cool at the time. Personally I’ve always felt they never really nailed that sandbox feel again with any of the sequels.