The downloadable map pack, "Steel and Titanium" is required to unlock these trophies.

Trophy	How to unlock
Cruiser Assault (Bronze)	Boost 5 times in Vekta Cruiser in a round.
Cruiser Engineer (Bronze)	Repair 5 objects in Vekta Cruiserin a round.
Cruiser Medic (Bronze)	Revive 5 allies in Vekta Cruiser in a round.
Cruiser Saboteur (Bronze)	Kill 5 enemies while disguised in Vekta Cruiser in a round.
Cruiser Scout (Bronze)	Kill 5 enemies while cloaked in Vekta Cruiser in a round.
Cruiser Tactician (Bronze)	5 allies spawn on your spawn grenade in Vekta Cruiser in a round.
Wasteland Assault (Bronze)	Boost 5 times in Wasteland Bullet in a round.
Wasteland Engineer (Bronze)	Repair 5 objects in Wasteland Bullet in a round.
Wasteland Medic (Bronze)	Revive 5 allies in Wasteland Bullet in a round.
Wasteland Saboteur (Bronze)	Kill 5 enemies while disguised in Wasteland Bullet in a round.
Wasteland Scout (Bronze)	Kill 5 enemies while cloaked in Wasteland Bullet in a round.
Wasteland Tactician (Bronze)	5 allies spawn on your spawn grenade in Wasteland Bullet in a round.