A P H E L I O N mod for Half-Life 2 Aphelion is a Half-Life 2 Mod that set in a mysterious massive facility surrounded by the Massive Wall and what's beneath under, you play as a Wanderer U.S. Soldier who woke up on a highway to the Wall called Outer Haven Welcome to Aphelion Aphelion is a Half-Life 2 Mod that set in a mysterious massive facility surrounded by the Massive Wall and what's beneath under, you play as a Wanderer U.S. Soldier who woke up on a highway to the Wall called Outer Haven Maps: The map starts to Highway to Blockade and to Outerhaven Wall, I map the Outer Haven first, and that was a bad idea