The greatest Half-Life modification ever made. You can't play BooM... BOOM PLAYS YOU!
Tesha Software is a little group of game developers that makes crazy and unusual projects. The history of the group began back in 2007 when Boomer published his concept of a Half-Life modification. Unfortunately, his skills were too low, and one year later he had not even started working on the project yet, while still talking a lot. In 2008, Tesha Software helped Boomer (against his own will) designing and releasing a mod based on his original concept.