The official MechWarrior 4 site offers two multiplayer maps from the Inner Sphere 'Mech Pak as free downloads, allowing owners of the original to play them online without the expansion pack. The Coliseum map clocks in at a modest 8.2 MB while the Gagetown map is significantly larger at 20.8 MB, and both require the recent version 3.0 patches to function correctly (story). The official FAQ has been updated with a few new entries as well.