To play MWLL you need Crysis Wars which you get a couple of different ways. In fact this variety often emphasizes using combined tactics to get the upper hand. MechWarrior: Living Legends is a MW-based mod for Crysis Wars that ahs won several awards for Mod of the Year and features many new advancements not seen in past MW games, most notably Combined Arms Warfare allowing you to pilots not only mechs but tanks, VTOLs, Aerospace, and even Battle Armor all in the same match.