Lurking in the Shadows is a multiplayer first-person shooter. In the main gamemode, Hunt, there are two sides: Blacke Sanctuary Lurker Unit (BSLU) and Lurkers. As a Blacke Sanctuary Lurker Unit (BSLU) Member: Hunt down an invisible enemy with great powers. As a Lurker: Defend yourself against 9 BSLU Members that are on an inquisition to kill you. You will do the same at all costs.