A two-player abstract strategy game on a 9×9 board. Fold your pieces to advance diagonally. Unfold them into flags — moving like rooks across rank and file. Plant three flags on your opponent's back row, or cut their forces to three.

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Planned Release Date: September 2026

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About This Game

Everything hinges on the fold

Paper Flags is a two-player strategy game on a 9×9 board. Every pieces starts folded: moving one square diagonally forward, contained and deliberate. Unfold it, and it becomes a flag: sliding any number of squares along a rank or file, like a rook with somewhere to be.

That change—one piece, one action, no movement—is enough to end a game.

A screenshot showing the board in early-game

Three Actions | Constant Pressure

On your turn, you choose exactly one: move a piece, fold a flag down, or unfold a piece into a flag. The board is never still.

Victory comes one of three ways. Territory, Domination, and Overrun. To Dominate your opponent, reduce them to three pieces or fewer. To Territorially Overpower them, plant three flags on your opponent's back row.

If your opponent is one legal action from winning, you are Under Threat and your next move must break it. If you can't, you are Overrun.

Mid-game screenshot showing flag-pieces deep in enemy territory

For chess players and strategy fans

The structure is recognizable: two players, perfect information, no luck. The driving goals of territory and elimination are familiar. But the fold mechanic shifts the calculus in ways that take more than a couple of games to really feel. Pieces don't just threaten where they stand, they far more often threaten what they might become.

A piece sitting quietly on the fourth rank is a flag waiting to seize control.

A screenshot showing two very cautious players, who have each unfolded many flags before making any advances

Features

  • Player vs Computer: Four AI difficulties, from approachable to punishing

  • Player vs Player: Local hot-seat on the same screen

  • Play Online: Invite a friend for a remote match

  • Computer vs Computer: Watch the AI battle itself

  • Controller Support

  • Multi-platform play

About

Paper Flags is developed by Stephen Merriam at Winterlude Interactive.

System Requirements

Windows
SteamOS + Linux
    Minimum:
    • OS: Windows 10 64-bit
    • Processor: Dual-core 2.0 GHz
    • Memory: 4 GB RAM
    • Graphics: OpenGL 3.3 compatible GPU, Intel HD Graphics 4000 / Radeon HD 7750 / GeForce GTX 650 or better
    • Network: Broadband Internet connection
    • Storage: 131 MB available space
    • Sound Card: Standard windows-compatible audio device
    • VR Support: VR not supported
    • Additional Notes: 64-bit system required. Steam client required for Steam friends/invites online play
    Recommended:
    • OS: Windows 11 64-bit
    • Processor: Quad-core 2.5 GHz or better
    • Memory: 8 GB RAM
    • Graphics: Intel Iris Xe / Radeon RX 560 / GeForce GTX 1050 or better
    • Network: Broadband Internet connection
    • Storage: 200 MB available space
    • Sound Card: Standard windows-compatible audio device
    • VR Support: VR not supported
    • Additional Notes: Recommended for 1080p play with ultra visual settings enabled
    Minimum:
    • OS: SteamOS 3.0 / Ubuntu 22.04 LTS 64-bit or equivalent
    • Processor: Dual-core 2.0 GHz
    • Memory: 4 GB RAM
    • Graphics: OpenGL 3.3 compatible GPU, Intel HD Graphics 4000 / Radeon HD 7750 / GeForce GTX 650 or better
    • Network: Broadband Internet connection
    • Storage: 98 MB available space
    • Sound Card: Standard Linux-compatible audio device
    • VR Support: VR not supported
    • Additional Notes: 64-bit system required. Steam client required for Steam friends/invites online play
    Recommended:
    • OS: SteamOS 3.0+ / Ubuntu 24.04 LTS 64-bit or equivalent
    • Processor: Quad-core 2.5 GHz or better
    • Memory: 8 GB RAM
    • Graphics: Intel Iris Xe / Radeon RX 560 / GeForce GTX 1050 or better
    • Network: Broadband Internet connection
    • Storage: 150 MB available space
    • Sound Card: Standard Linux-compatible audio device
    • VR Support: VR not supported
    • Additional Notes: Recommended for 1080p play with ultra visual settings enabled
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