The Orange Box achievements

Destroy the Combine cannon in the junkyard.

Survive the Hunter ambush with Alyx.

Steal a Zombine's grenade.

Escape City 17 with Alyx.

Defeat both antlion guards outside the White Forest.

Destroy the gunship in the hospital attic.

Survive long enough to get on the parking garage elevator.

Destroy the Citadel's reactor core.

Survive the rooftop strider battle in the ruins of City 17.

Kill 3 enemies using the crane.

Destroy six gunships in Half-Life 2.

Shut down the supression device by disabling its generators.