Welcome to Half-Life 2: Gopnik. After 21 months in development, hopefully it will have been worth the wait. Gopnik is a mod that lets you play the entire Half-Life 2 campaign in reversed order, from the Citadel to the City 17 trainstation. Each map has been edited to not only make it possible to backtrack, but also to ensure that the gameplay remains fun. This means that scripting in the maps have been extensively altered to preserve events such as coordinated enemy attacks. The world geometry has also been changed, although the changes are much more subtle with few exceptions. Other changes include strategically placed models to allow players to progress past obstacles which the player would normally not get past. Enjoy!