Rocket Riders

Beneath each enemy satellite there will be a blast boor, destroy the satellite to gain access. Repair your satellites to relock the doors.
Find one of the tunnels and get a friend or a sentry to rocket ride you across the lava. Or alternatively, use a cannon. Shoot down incoming rocket.
Find the extraction lab and use the power of the rock to become super, then go get elims. Remember to defend your side, most eliminations wins.