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SCP Additions is an SCP survival horror and facility-building mod for Minecraft 1.20.1. Inspired by SCP: Containment Breach and SCP Unity, it combines functional SCPs and containment machinery with a custom inventory, survival systems, keycard security, animated doors, and a large collection of facility-building content.
The latest public release documented by the repository is SCP Additions 3.0.7 — Hotfix. The current master branch is 3.0.8 — In Development, so mechanics described as 3.0.8 may not yet be present in the latest Modrinth or CurseForge file.
Version 3.0.7 made the server's gameplay configuration authoritative in multiplayer, synchronized supported settings on login and reload, corrected SCP-294 cup rendering and naming, improved SCP-173 behavior, and consolidated legacy SCP-294 drink items into the configurable generic cup.
The 3.0.8 development version adds:
- SCP-106, a roaming hunter with close-range and ranged corrosion attacks, phasing, ambush relocation, and Tesla Gate interaction;
- a shared roamer scheduler for SCP-173 and SCP-106, with separate gamerules and operator commands;
- a processing-power system and threat-aware facility decisions for SCP-079;
- editable Facility Signs for Core Rooms and door routing;
- SCP-012 photosensitivity controls and optional developer HUDs;
- the reintroduced, individually configurable world-entry sound.
- Getting Started — requirements, installation, first launch, and default controls.
- Gameplay Systems — inventory, Crafting, Status, Codex, contextual interactions, vitals, blink, and building content.
- SCPs and Facility Systems — SCP behavior, doors, readers, Tesla Gates, decontamination, and SCP-079.
- SCP-079 — System Control, processing power, threat-aware doors, Tesla Gates, and debug displays.
- SCP-106 — spawning, pursuit, corrosion, phasing, relocation, and counterplay.
- Facility Signs — placement, Screwdriver editing, text limits, formatting, and copy/paste.
- Hazmat Suit — equipment controls, protection, restrictions, and penalties.
- SCP-012 — containment, influence, damage, Bleeding, commands, and SCP-079 interaction.
- SCP-714 — protection, exposure progression, audio, and coma.
- Configuration Center — the recommended in-game editing workflow.
- Configuration Files — manual JSON reference and default-file behavior.
- SCP-294 — drinks, matching, colors, effects, and actions.
- SCP-914 — explicit recipes, inferred transformations, entities, players, and skins.
- Commands and Gamerules — administration and world controls.
- Compatibility and Troubleshooting — updates, optional mods, resets, and common problems.
- Development and Licensing — building from source, credits, music policy, and license.
Existing worlds and customized configuration files should always be backed up before changing versions.