Vectrex Gameplay: Malban's Berzerk Ultimate 

I needed something for the Vectrex Wars. Someone offered me one of theirs. In general, it is a way to expand the usual MultiCarts out there with a sim card and links to these homebrews. There might be some better carts that can do much more, but for right now, it's a nice expansion to either a personal cartridge collection (about 10 original carts for me) or a device to play homebrews and hacks.