Warning. Surveillance and detection systems inactive. Multiple subject containment failure. Facility compromised. I wonder what’ll happen to you?

In Decay Constant, play as a Vortigaunt trying to escape the clutches of both the combine and the dilapidated headquarters of pre 7 Hour War company Luxor Tech.
A former extraterrestrial lab rat, your link to the Vortessence is cut off due to Luxor Tech augmentations, and you must rely on a combination of Vortigaunt powers and traditional weapons to survive.
Uncover why the combine have established themselves at the headquarters of your former captors and escape the surreal decaying facility around you.


Decay Constant is a modification for Half-Life 2, the Half-Life™ franchise is © Valve® Corporation