Infantry

You can leave the mobile suit. Four actions on foot change the score. Do them when the area is empty enough that you are not shot on the way.

Relay capture

Several relays sit on the map. Infantry takes them. After the capture, your team can sortie from that point.

Base bomb

Plant at the enemy base. It explodes after a delay and pays a large score. Defenders defuse it on foot before that.

Support fire

A relay your team holds becomes able to call support fire after some time. Infantry at the relay orders a strike on a chosen area. Keep the relay if you want the strike.

Hack

If an enemy pilot has left the suit, you can start its self-destruct. The same action cancels a hack on your own empty suit. The opening is when they dismount to capture or plant.