The Orange Box achievements

Help Alyx snipe 30 enemies in Episode One.

Get five kills in a row without dying.

Kill an Elite Soldier with his own energy ball.

Unlock the rocket launcher lambda cache in chapter Under The Radar.

Save the missile silo from the Combine offensive.

Use DOG's ball to make a basket in Eli's scrapyard.

Beat two Portal advanced maps.

Fall 30,000 feet.

Break the mini-teleporter in Kleiner's lab.

Win 2Fort with a shutout.

Secure the launch doors on missile silo 2.

Survive the ambush at White Forest Inn.