SCP Secret Laboratory is the multiplayer horror game from Northwood Studios, first released on Steam in 2017 and built around the SCP Foundation's collaborative fiction. In matches, players encounter SCP-049-2, the reanimated zombie-like victims created by SCP-049, and short undead vocal cues help signal their presence in dark corridors. Clips from the game spread through YouTube, Discord and soundboards, where this brief zombie sound was kept on its own for edits. It stays popular because SCP fans recognise the threat instantly, even outside actual gameplay.