How SCP:SL Works
Each round of SCP: Secret Laboratory starts with players randomly assigned to roles. SCPs are anomalous entities that must kill or contain facility personnel. Class-D Personnel are prisoners trying to escape the facility. Scientists work alongside the Mobile Task Force (MTF) to contain SCPs and neutralise threats. The Chaos Insurgency, a rival organisation, wants to rescue Class-D personnel and disrupt the MTF. Every faction has different win conditions, and the push-and-pull of these competing objectives creates chaotic and unpredictable rounds.
The game is free to play and regularly updated. A full round typically lasts 10–20 minutes, making it easy to jump in and out. Unlike many multiplayer games, there is no matchmaking — you browse and connect to community-hosted servers directly through the in-game server browser, which is where LobbyLink's listings come in.
The game's appeal comes from emergent moments: a Class-D and an SCP forming a temporary alliance, a tense standoff at the checkpoint, or a last-second MTF rescue. These moments happen differently every round because of the random role assignment and open-ended objective structure.
Vanilla vs EXILED Servers
Vanilla SCP:SL servers run the base game without any plugins. They offer the purest version of the game as the developers intended — helpful for learning the mechanics without custom rule changes confusing the experience. Vanilla servers are recommended for new players who want to understand the game before exploring community modifications.
EXILED is the most widely used plugin framework for SCP:SL. It allows server owners to install a vast library of community plugins that add new mechanics, change game balance, introduce new roles, create custom game modes, and automate moderation. An EXILED server might add custom SCPs not in the base game, adjust spawn rates, add an XP system, or run entirely custom round types like hide-and-seek or boss rounds.
The NWApi (Northwood API) is the official Northwood Studios plugin framework, which has gained popularity as an alternative to EXILED. Many servers are migrating to NWApi as it receives official support. When browsing LobbyLink, the server listing or tags will usually indicate which framework the server uses. Some servers run both for compatibility.
Community Events
Community events are one of the highlights of the SCP:SL server scene. Server owners regularly run scheduled special rounds where the normal rules are suspended in favour of a curated experience. Common events include gun game (every kill gives you a new weapon), last man standing, all-SCP rounds, friendly fire enabled rounds, and custom scenarios created with plugins.
Many SCP:SL communities have Discord servers where they announce event schedules in advance. Showing up for a planned event with 20–30 active players on a good server creates some of the funniest and most memorable moments the game has to offer. Checking the Discord linked in a server's LobbyLink listing is the best way to find out when events are running.
Some servers have a dedicated Events role in their Discord that you can self-assign to get notifications when an event is starting. If you enjoy SCP:SL but find regular rounds feel repetitive after a while, targeting event-focused servers is a great way to keep the game fresh.
Server Rules and Culture
SCP:SL server culture varies significantly. Some servers enforce strict no-teaming rules — forbidding Class-D and SCPs from cooperating, or preventing MTF and Chaos from assisting each other. Others explicitly allow or even encourage cross-faction roleplay and alliances. Some servers enable friendly fire; others disable it entirely to prevent griefing. Knowing the rules before you join saves you from accidental violations.
Most servers display their rules in the MOTD (Message of the Day) that appears when you join. Take a minute to read it — rule violations result in kicks or bans, and many server owners take their communities seriously. The most common ban reasons are killing teammates, "KOS" (killing Class-D on sight as a scientist without cause), teaming in violation of server rules, and microphone spam.
Staff presence varies enormously between servers. Well-staffed community servers have admins who respond to reports quickly and run events regularly. Poorly staffed servers may have rules on paper but no enforcement in practice. Looking at how long a server has been listed, its Discord activity, and its uptime history on LobbyLink gives you a reasonable picture of how well-run it is.
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Browse the full SCP: Secret Laboratory server list on LobbyLink with live player counts and uptime.