Rainbow Six Siege is Ubisoft's tactical shooter first released in 2015, built around tight five versus five rounds where one team kill can ruin a match. Clips like this TK 78 rage moment spread through gaming soundboards and edit communities because that pressure produces loud, instantly readable reactions. The TK in the title points to team kill, the trigger for many Siege meltdowns online. It stays popular as a ready made rage reaction for creators who need frustration that viewers understand without any setup or context.