Enlarge (credit: Games Done Quick)

The week-long Summer Games Done Quick gaming marathon concluded on Saturday after raising $2.1 million for charity. That may very well lead outsiders to ask: What kind of gaming event can raise so much money for a global nonprofit like Doctors Without Borders?

Fans of the Games Done Quick organization, which runs two charity marathons a year, might answer that question by pointing to a slew of “speedruns”—attempts to beat a video game as quickly as possible—for classic and modern titles alike. Or they might start shouting a bunch of inside jokes and catch phrases, which are abundant at such a tight-knit, community-driven gathering of some of gaming’s biggest nerds.

Either way, while the event has since concluded, its most impressive and silliest moments live on thanks to a complete YouTube video dump. Hours upon hours of speedruns, both quick and lengthy, live on at the Games Done Quick channel. So we thought we’d take this American holiday opportunity to help outsiders catch up on the craziness with a few of our favorite full-game clips.