The greatest Half-Life modification ever made. You can't play BooM... BOOM PLAYS YOU!
Tesha Software is a little group of game developers which is targeted on making crazy, unusual and conceptual projects. The history of the group begins back in 2007 after the psychopathic Boomer published the concept of his new modification for Half-Life. Unfortunately the concept had been remained only a plain concept... just until some more skilled people decided to realize this insane idea in 2008.
What does "Tesha Software" mean?
"Tesha" is a poor transliteration of the Russian word which means "mother-in-law". It is written in Russian as "тёща" and must be pronounced roughly as "tёshcha" (the pronunciation of "ё" is similar to "u" in "burn"). This is related to one very memetic Russian anecdote about a person who was very happy on funeral of his mother-in-law. :)