A solid game to fulfill your mechanical blood lust.
Multiplayer is pretty inconsequential. The 'instant action' mode would be fun but is hampered by awful menus with terrible programming, forcing you to repeatedly set things over and over until you get what you want. The campaign is the meat and potatoes and certainly rocks. Building your mercenary company from the ground up is quite satisfying and the arena is a fun distraction.
If you can find a copy, recommended. It's a good many hours of simply solid mech-smashing action.