One of the coolest things when I was playing games as a kid was working my way through the single player story, but being able to "skip ahead" and see all of th

One of the coolest things when I was playing games as a kid was working my way through the single player story, but being able to "skip ahead" and see all of the cool guns and gadgets by opening a multiplayer session. Nowadays you're locked out of most of the weapons in MP unless you're willing to put in 40+ hours (and much much more in some games).