Evacuation is a total conversion modification for Half-Life 2: Episode Two in which the player assumes the role of a Resistance soldier attempting to exfiltrate White Forest to a safezone; doing so entails rendezvousing with Resistance forces to neutralise a multitude of Combine enemies en route.

In a divergence from normality for Half-Life modifications, the protagonist of Evacuation is largely unremarkable. Gone then is Gordon Freeman's ever-trusty Crowbar, the player receiving an axe in lieu thereof. Another departure from the mainstay features of Half-Life modifications is present in the form of the ADS (Aim Down Sights) functionality with which the vast majority of weapons are equipped, replacing the standard mouse 2.

Unlocks upon the initiation of the crashsite cutscene. Subsequent to the battle sequence during which Strider Killer is obtained, the protagonist will awaken in White Forest, surrounded by the strewed debris of the Resistance helicopter.

Unlocks upon arriving at the raider camp.

Unlocks upon neutralising the Combine Hunter-Chopper encountered at the churchyard. This is the final major encounter of the campaign.

Unlocks upon completion of the campaign, at the beginning of the postgame credits.

Unlocks upon neutralising the three destructible Combine Striders during the opening sequence of the campaign. Bearing in mind the aforementioned lack of reticle, and given that this is one of the few guns that does not feature an ADS mechanic, it is advisable for the player to adopt a trial and error approach to this achievement, firing missiles as often as possible, and adjusting aim accordingly. The achievement unlocks shortly before the conclusion of the sequence, whereby the fifth Strider, itself impervious to the player's missiles, compromises the helicopter with a single shot from its underside Warp (Gauss) Cannon.

Unlocks upon falling into the ravine. Shortly after the helicopter crash, the player will encounter an abandoned camp with three large canvas tents. Simply run to the North-West corner of the camp to find a section with no fencing, and cast yourself off the precipice.

Let's kill the corps tonight…

Unlocks upon neutralising the Antlion Guardian.

Unlocks upon embarking the exfiltration train with Gnome Chompski in tow. Gnome Chompski debuted in Valve's 2007 title Half-Life 2: Episode Two, during which players could earn the Gnome Alone achievement for escorting him to the end of the game. He has made subsequent appearances in various Valve titles and community-made modifications alike, including Left 4 Dead 2, Half-Life: Alyx, and the Half-Life 2: Episode Two modification Amalgam.