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Subterfuge
A week-long multiplayer game of strategy, diplomacy, and betrayal. Schedule moves for hours in the future, forge fragile alliances, and time the perfect backstab as events unfold in real time. Coming to Steam Early Access with mobile cross-play and a player pool running since 2015.

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Features
Single-player
Online PvP
Cross-Platform Multiplayer
Steam Cloud
Steam Turn Notifications
Family Sharing
Steam is learning about this game 
Requires 3rd-Party Account: Subterfuge Accounts (Supports Linking to Steam Account)
Languages:
Interface Full Audio Subtitles
English ✔ ✔
Content
Includes Interactive Elements

In-game chat, Online interactivity

Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“We are looking for feedback from testers on the balance of existing specialists and assistance in designing and adding new ones. Additionally, we would like to improve our UI/UX to make Subterfuge more accessible.”

Approximately how long will this game be in Early Access?

“Around 3 months.”

How is the full version planned to differ from the Early Access version?

“We plan for the full version of Subterfuge to have additional content and features influenced by community feedback during the Early Access period. We plan to add new specialists alongside the 29 that ship in Early Access, and to rebalance the roster using Early Access match data. Steam achievements and Steam stats are not in the Early Access build, and we plan to add both. We also plan refinements to the UI and UX, including display and accessibility options. Early Access launches on Windows and Mac, in English only, so Steam Deck and Linux support and more languages are planned before the full version.”

What is the current state of the Early Access version?

“See the "About This" section for details. ”

Will the game be priced differently during and after Early Access?

“We're not planning on changing the price when we leave early access.”

How are you planning on involving the Community in your development process?

“Secret Plan has an active Discord where current players are encouraged to provide feedback and organize private matches.”
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This game is not yet available on Steam

Planned Release Date: Sep 30, 2026

This game plans to unlock in approximately 2 weeks

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About This Game



Subterfuge is a week-long multiplayer game of strategy, diplomacy, and betrayal that plays out in real time. Check in for ten minutes, a few times a day: read the sonar, schedule your orders, and reply to the ally who insists the fleet massing on your border is "purely defensive." Then close the game and get on with your day while your plans execute.

On PC at last with cross-play into a community that has been running continuously since 2015.

Drive the Time Machine




Drag the Time Machine forward and watch tomorrow unfold. See where every visible sub will be, how combat resolves, and what your factories will have produced by Thursday. Then, schedule your own orders to execute at any moment, hours or days ahead. Launch the invasion at 4:12 a.m. without setting an alarm but remember everyone else has a Time Machine too.

Depth that fits around your life


A game of Subterfuge lasts a week or more, but a session lasts minutes. It was designed by two new parents who wanted Diplomacy-grade scheming without giving up their evenings. The strategy happens in your head and on your schedule.

The real map is the other players


Every alliance, border pact, joint strike, and deception in Subterfuge happens in chat. None of it is enforced by the game. A treaty is worth exactly as much as the person who signed it, intel is worth exactly as much as its source, and the player feeding you sonar reports may be feeding your rival the same. Winning means reading people as sharply as you read the map.

No dice. No luck. Only people.


The Time Machine can show you tomorrow because there is no randomness. Every battle can be forecast down to the last driller before it happens. Recruit powerful specialists to tilt the math and bend the rules. The only truly unknowable variable in Subterfuge is human intention.

Community Crossplay Since 2015


Join a cross-platform player pool that has kept Subterfuge alive and updated for over a decade. Play the same game from your desk and your phone. Open the war room on a second monitor at work, then answer a treacherous counter-offer from the school pickup line.

A typical week


  • Day 1: Nine polite introductions. Four proposed alliances. One of them is sincere.
  • Day 2: You and your neighbor agree to keep borders demilitarized. You both start counting drillers.
  • Day 4: Your ally proposes a joint strike on the olive. Olive has just proposed the same about your ally.
  • Day 5: Drill a mine. Sonar picks up a "defensive" fleet drifting towards it, thirty hours out. Plenty of time. You schedule your counter, draft two very different messages, and head to lunch.
  • Day 6: The trap you scheduled yesterday ago springs mid-meeting, exactly as planned. You watch it from your desk and say nothing.
  • Day 7: Trap closed. Olive's mine captured.
  • Day 8: Victory. Your former ally sends a simple message: "Well played. Rematch?"

System Requirements

Windows
macOS
    Minimum:
    • OS: Any
    • Processor: Any
    • Memory: 8 GB RAM
    • Graphics: Any
    • Storage: 1 GB available space
    Minimum:
    • OS: Any
    • Processor: Apple or Intel
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