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Expanding Beyond the Limits

By default, Left 4 Dead 2 is hardcoded to support 4 Survivors and 4 Infected. To host a “Mega-Server” (e.g., 10v10 or 15v15), you must utilize a two-step process: using an Extension to unlock the engine’s player capacity and a Plugin to manage the actual spawning of extra character models.
Reading TimeDifficultyLast Updated
7 minutesIntermediateJanuary 2026

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1. The Unlocker: L4DToolZ

The first step is to tell the engine that it is allowed to accept more than 8 connections.
  1. Download the latest L4DToolZ extension.
  2. Upload the files to your /addons/sourcemod/extensions/ directory.
  3. Startup: Ensure your FREAKHOSTING Startup Command includes -maxplayers 32 (or your desired count).
  4. Config: Add these to your server.cfg: 
    sv_maxplayers 20
sv_visiblemaxplayers 20

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2. The Manager: SuperVersus

Once 20 people can join, you need a way to spawn 10 Survivor bots and 10 Infected bots. Without this, the extra players will simply be stuck in Spectator.
  1. Install the SuperVersus plugin to /addons/sourcemod/plugins/.
  2. Navigate to: cfg/sourcemod/plugin.l4d_superversus.cfg
  3. Configure the limits:
    • l4d_survivor_limit 10
    • l4d_infected_limit 10

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Last Updated: January 2026 | L4D2: Slots expanded.