

The game becomes gradually more difficult as the player progresses and the Entrance Zone marks the appearance of Mobile Task Force Epsilon-11 "Nine-Tailed Fox", a squad of elite soldiers deployed by the Foundation to recapture the breached SCPs either by re-containing them or by destroying the facility by detonating the nuclear bombs situated throughout. Some SCPs may appear throughout the entire facility, however. New SCPs and artifacts may appear in one map, but not in another. One of the game's primary features is randomly generated rooms. Another one of these SCPs is SCP-096, which will kill the player if its face is viewed, but otherwise will remain docile. Certain environments (such as rooms filled with decontamination gas) will cause the player to blink more often. The player is pursued by numerous hostile SCPs, which must be evaded by D-9341 to avoid death, which is made more difficult by the player needing to blink periodically, enabling SCP-173 to attack if it is nearby. The player controls a "Class-D" personnel as he attempts to escape an underground research and containment facility operated by the SCP Foundation amidst a total containment breach of its hazardous anomalies, designated "SCP"s.
