Public Game Design Document
SCP FoundationSite-19
Full design document — game modes, SCP roster, difficulty system, roadmap, and collaborator call. This is a living document and will change as development progresses.
01 — Overview
What Is This Game?
SCP Foundation: Site-19 is a multi-mode 2D game set entirely inside Site-19 — the SCP Foundation's largest containment facility.
Inspired by Surviving the Abyss for the management layer and SCP: Containment Breach for the survival layer.
Genre
Management + Survival
Build and run a containment facility, then survive inside it. Two very different games in one.
Visual Style
Pixel Art
Top-down 2D pixel art. Dark, clinical — grey concrete, red warning trim, flickering lights.
Platform
PC / Browser
Primary target: PC via Steam. A free browser version on a personal server is also planned.
Status
In Development
Solo developer project. This GDD is public to attract collaborators and keep development transparent.
02 — Game Modes
One Facility. Multiple Perspectives.
Every mode takes place inside Site-19. v1.0 ships with a fixed hand-crafted map. Later updates bring procedural layouts and a full facility builder.
v1.0 Launch
Site Director
The management mode. Build rooms, hire staff, manage resources, contain SCPs, respond to crises. Inspired by Surviving the Abyss.
v1.0 Launch
D-Class Subject
You are expendable. No weapons, no clearance. Survive a mass containment breach using only stealth and wit.
Post-Launch v1.1
Scientist
Keycard access, lab equipment, SCP knowledge hints. More tools than D-Class — but not a fighter.
Post-Launch v1.2
Security Guard
Armed with a pistol. More capable — but SCPs treat you as priority target. The gun makes you a target.
Community Decision
MTF Agent
Re-contain SCPs instead of escaping. Fully armed. Only built if the community wants it post-launch.
03 — SCP Roster
Launch Roster
NOTE
The v1.0 launch roster contains 3 SCPs. Three well-implemented SCPs with deep mechanics is better than eight shallow ones. More SCPs are added in updates as art assets are sourced.
SCP-049
The Plague Doctor
Euclid
+
Manager Mode
Requires standard containment cell. Generates moderate threat. Experiments with D-Class produce high research output.
Escape Mode
Walks corridors slowly. Touch is instant death. Reanimates corpses as SCP-049-2 zombie instances — a spreading secondary threat.
Core Mechanic
Corpse management. 049-2 instances accumulate and block corridors. Danger builds gradually.
Difficulty
Safe: 1 instance · Euclid: 1–2 · Keter: 2 instances + 049-2 spread
SCP-173
The Sculpture
Keter
+
Manager Mode
Requires reinforced containment. High power cost. Integrity drops rapidly if understaffed.
Escape Mode
Cannot move while observed. The instant line-of-sight breaks it teleports toward the player. Blinking is lethal.
Core Mechanic
Line-of-sight awareness. The foundational tension mechanic of the escape mode.
Difficulty
Euclid: 1 instance · Keter: 2 instances at increased speed
SCP-682
Hard-to-Destroy Reptile
Keter
+
Manager Mode
Requires heavy containment. Enormous power and credit drain. Presence raises global threat constantly.
Escape Mode
Keter difficulty only. Cannot be stopped. Roams as an apex predator. Contact is instant death.
Core Mechanic
The "run" trigger. When 682 appears all strategy dissolves into pure survival instinct.
Difficulty
Keter only. Not present on Safe or Euclid.
04 — Difficulty System
Object Class Difficulty
There is no Easy / Medium / Hard. The game uses SCP object class terminology as the difficulty selector for all escape modes.
| Class | Description | Active SCPs | Event Rate | Items |
|---|---|---|---|---|
| SAFE | Lowest threat. Fewer SCPs, more items, slower events. Designed for learning the game. | 2–3 | Low | Plentiful |
| EUCLID | Standard experience. Unpredictable SCP behaviour, moderate items, regular events. | 4–5 | Medium | Moderate |
| KETER | Maximum difficulty. All SCPs active including SCP-682. Scarce items, relentless events. | 6–8 | Constant | Scarce |
05 — Roadmap
Development Roadmap
Development follows a milestone system — each milestone produces a testable build before moving to the next.
v1.0 Launch
Post-Launch v1.1
Post-Launch v1.2
Future
M0
Project Setup
v1.0 Launch
Unity installed, pixel art assets imported, version control live.
M1
Grid & Room Placement
v1.0 Launch
Tile-based facility grid. Rooms can be placed, validated, and removed.
M2–M3
First SCP + Resources
v1.0 Launch
SCP-173 contained. Credits, Power, Research Points tracked in HUD.
M4–M5
Staff System + Events
v1.0 Launch
Hire and assign staff. First random events fire and require player response.
M6–M7
Full Manager Mode
v1.0 Launch
All 3 launch SCPs, all room types, full event set, save/load, time controls.
M8
D-Class Escape Mode
v1.0 Launch
Player controller, SCP AI, keycard doors, 3 escape routes, difficulty selector, permadeath.
M9
Polish + Release
v1.0 Launch
Art integrated, audio added, main menu built. Release on Steam and/or browser.
M10
Scientist Mode
Post-Launch v1.1
Second escape mode. Keycard access, lab crafting, SCP knowledge hints.
M11
Security Guard Mode
Post-Launch v1.2
Third escape mode. Armed gameplay, survivor escort, higher SCP aggression.
M12
Procedural Gen + Builder
Community Decision
Procedural escape maps and full facility builder for Manager Mode.
06 — Honest Reality
What This Project Actually Is
Transparency matters. This is not a funded studio project. Here is the honest situation.
✓ What exists right now
- Unity project started
- Pixel art asset pack — all core character sprites
- D-Class, Scientist, Guard, SCP-049, SCP-173, SCP-682 confirmed
- Full facility tileset confirmed
- This GDD and website
⚠ Current constraints
- Solo developer, student, limited free time
- Very limited budget — no paid positions right now
- Art style locked to purchased pixel art pack
- No additional SCP assets at this time
- No fixed release deadline
NOTE
This project may not reach a full Steam release. It may release as a browser game first, or stay a personal build for a while. None of those outcomes is a failure. If the project earns any income, the first priority is commissioning more art.
07 — Collaborate
Want to Help Build This?
Looking for Collaborators
Any kind of help is welcome — pixel art, programming, sound design, UI, writing, playtesting. You don't need to be an expert. If you want to contribute something, get in touch.
Pixel Art
Programming
Sound Design
UI / UX
Playtesting
Any skill welcome
Being upfront:
This is a solo student project with no current budget for paid work.
Collaboration right now would be unpaid, with revenue share if the game sells.
Credit for all contributors will be prominent in-game and on the store page.
If the situation changes, paid work comes first.
This is a solo student project with no current budget for paid work.
Collaboration right now would be unpaid, with revenue share if the game sells.
Credit for all contributors will be prominent in-game and on the store page.
If the situation changes, paid work comes first.
✓ Open to collaborators from any country.
You can contact in English, Dutch, or Polish. If you don't speak any of those, reach out anyway — we'll figure it out.
Get In Touch