Half-Life was released by Valve in 1998 and its Black Mesa scientists became some of the most quoted NPCs in gaming, thanks to their earnest delivery and repetitive ambient lines. This greeting is one of their standard interaction barks when the player gets close. Clips of the scientists later spread through forums, YouTube edits and soundboards because the voices capture early PC gaming perfectly, and modern players still use the greeting as shorthand for friendly but useless lab staff in memes and machinima.