Causality Effect
This article is a stub. You can help by adding to it. |
![]() |
This article is an orphan, meaning that few or no articles link to it. |
Causality Effect is a single-player mod of Half-Life 2 released in 2007.
Overview
Starting with the "Red Letter Day" of the original game, the story is changed. The teleportation experiment creates a hole in time and space, and the player's task is to travel through time and correct events that happened in the past. Features multiple endings.