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NashForge
Think one move ahead of everyone — a game-theory / strategic-reasoning game for ages 15–18. Play short strategic games, then discover dominant strategies, mixed strategies, and Nash equilibria by playing first and theorizing after — and apply them to real dilemmas like climate cooperation and pricing wars.
▶ Play it nowBuilt for sittings of about 25 minutes on the screen. That is our design budget, not a measurement.
#3E5AC0 Characters who teach
Meet the cast
NashForge's characters are realistic people, not mascots, and each one shows one idea from game theory. Dahlia plays the best move no matter what, Elena finds the point neither side wants to leave, Cai and Dex act out the choice between cooperating and betraying, Tao repeats your last move, and Remy mixes moves to stay unpredictable. Zara, Ines, and Auggie cover whether the pie can grow, reasoning backward from the end, and designing fair rules. Thalia is the mentor who sets each goal and helps your teen reflect.
Dahlia
Dominant strategy — plays the best move regardless of what the opponent does
Elena
Nash equilibrium — finds the stable point neither side wants to leave
Cai
Cooperation (prisoner's dilemma) — chooses the mutual-best cooperative move
Dex
Defection (prisoner's dilemma) — takes the tempting individual defect (Cai + Dex = the PD case)
Tao
Iterated / tit-for-tat — mirrors your last move across rounds, building reputation
Remy
Mixed strategy — randomizes to stay unpredictable (the penalty-kick mixer)
Zara
Zero-sum vs non-zero-sum — reads whether the pie is fixed or can grow
Ines
Backward induction — reasons from the end of the game tree back to now
Auggie
Mechanism / auction design — designs rules so honesty is the best policy
Thalia
Mentor — sets a strategic goal, plays, and guides reflect-on-strategy (the AAR guide)
What's inside
Learning goal
Think one move ahead of everyone — a game-theory / strategic-reasoning game for ages 15–18. Play short strategic games, then discover dominant strategies, mixed strategies, and Nash equilibria by playing first and theorizing after — and apply them to real dilemmas like climate cooperation and pricing wars.
Question kits
16 curriculum-aligned question kits, 400 questions in all, mapped to recognized standards.
On-device AI mentor
FoundationModels-powered hints, feedback, and adaptive difficulty — all running locally.
Mentored by Thalia — on-device AI, no data leaves the device.
How NashForge handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ Free — no ads, no in-app purchases
- ✅ No personal information collected from children — in line with COPPA (updated by the 2026 FTC amendments)
- ✅ No chat with strangers — play-together rooms use a short code and preset emotes, never typed messages
For you, the grown-up
The grown-up side of NashForge on Spark & Whetstone, our free site for grown-ups: Thinking Under Fog. They look for the move nobody can improve on alone; you play the bluffing half at the table.
NashForge runs on ForgeKit — the open-source Swift Package Manager framework that powers every Spark & Anvil app. ForgeKit ensures consistent accessibility, COPPA compliance, and design language across the portfolio, so your kid's progress and preferences feel coherent across every app they touch.
Coming to the App Store
NashForge is in active development. Email us to hear when it ships — no marketing, no spam, just a one-shot launch announcement.
Email me at launch