SCP: Secret Laboratory is a free-to-play multiplayer horror game set during a catastrophic breach at the SCP Foundation’s Site-02. Scientists, prisoners, guards, specialist response forces and the Chaos Insurgency are caught in a crisis with competing aims: escape, restore containment, sabotage the facility or eliminate its occupants. The shifting conflict between these groups gives the disaster a distinctly human dimension alongside the threats posed by the escaped SCPs.
Players experience the emergency through five human classes, from Scientists trying to get out with help from security personnel to Class-D prisoners who begin without equipment and seize the chance to flee. Facility Guards must protect Scientists, stop prisoner escapes and hold off SCPs until reinforcements arrive. Mobile Task Force agents work to contain the breach, while the Chaos Insurgency attacks Foundation personnel and seeks to rescue Class-D. Players can also take the role of an SCP and hunt others through the facility.
Site-02’s maze-like layout links Light and Heavy Containment, the Entrance Zone and the Surface evacuation area. Its emergency infrastructure becomes part of the struggle: Tesla Gates can electrocute those caught in their blast, bulkheads can briefly hold back pursuers, and an underground nuclear warhead threatens to destroy the site. These hazards and the opposing objectives make each breach a contest over survival and control, rather than a simple escape route.
