SCP: Dead Letter Protocol
Something is wrong inside Site-19. Something worse is out there. A strategic horror roguelike where no two runs tell the same story.
Investigate anomalies, contain creatures you don't understand, and try to hold a facility together while it falls apart around you. You won't come back stronger between runs. You'll come back knowing what went wrong, and that changes everything.
Announcement Trailer
Gameplay
About This Game
Each scenario is a different way the world ends. You choose which one to face, then fight to prevent it across a series of missions while the facility around you falls apart on its own. Runs last about an hour. You won't survive your first. That's the point.
The facility degrades every round. Anomalies escalate on their own. The entropy meter climbs whether you're paying attention or not. You'll spend the whole run deciding what to save and what to let go.
Your first run is survival. Your fifth is strategy. Your tenth is the one where everything you've learned finally comes together.
The Four Phases
Player Phase. 3 actions per round to investigate, recruit, resupply, or move. Every location has more opportunities than you have time to pursue. The real decision isn't what to do. It's what to ignore. Where you end your turn determines your encounter.
Encounter Phase. An event triggers wherever you end your turn. Negotiations. Crises. Creatures that shouldn't exist. Each location telegraphs the type of encounter it holds — but not the specifics.
Anomaly Phase. Anomalies count down on their own. At zero, they activate and start roaming the facility. They block paths. They damage locations. They don't stop.
Entropy Phase. Quiet at first. Until it isn't. Lockdowns seal off entire wings. Failures cascade from one system to the next. At 100%, the scenario's final threat arrives. It doesn't care how prepared you are.
Cycle repeats -- entropy escalates each round
You Don't Know What You're Fighting
Every creature starts behind black bars. You don't know its name. You don't know what it does. You don't know how to hurt it. Your loadout is locked before the fight begins. Match the creature's hidden vulnerabilities and your weapons will tear through it. Miss, and your best gear does almost nothing.
Fighting isn't the only way forward. Observe to reveal hidden traits. Talk to the creature through branching dialogue that can expose weaknesses or make things worse. Contain it, destroy it, or run. Every path is viable. None of them are safe.
Creatures you contain are documented permanently. Every trait revealed. Every vulnerability exposed for all future runs. The next time you face it, you'll be ready.
Screenshots
Between Runs
New operatives and scenarios unlock. But the real difference is you. Routes that seemed impossible start making sense. Strategies you couldn't see before become obvious.
Other roguelikes make you stronger. This one makes you dangerous.
Key Features
For Fans Of
The investigation and replayability of World of Horror. The dread of Darkest Dungeon. The universe of the SCP Foundation.
No jumpscares. No grinding. Just decisions and what they cost.