Here is the full list of all 15 Evacuation achievements.
Start the game after the crash
Meet the Raiders
Fall into the ravine
Kill all 3 Striders
Kill the ant lion guardian
Die from the current in the socket
Jump on a nearby cable car using a rocket launcher
Clear the ravine of all zombies
Find a box of supplies behind the waterfall
Destroy the Combine Helicopter
Complete the walkthrough
Kill the bird before it sits in the trap
Find the Kalashnikov assault rifle
Bring the gnome from the sawmill to the end
Kill the raider before he kills the rebel medic