Deep NFL franchise management. World-state, agent AI, rivalry DNA, GM legacy arcs, and PFR-calibrated simulation. Browser-native. No install.
VaultSpark is built around the idea that franchise simulation should feel like running an actual organization — every decision with lasting consequences.
Owner personality, staff culture, scheme identity, and player agent personalities all affect outcomes — not just ratings.
Season and career statistics are guardrailed against real NFL baselines from Pro Football Reference. Numbers feel real.
Teams build genuine rivalry heat over time based on matchup history, division battles, and playoff upsets. It escalates.
Your career is tracked across every season. Progress through 6 tiers — from Young Gun to Immortal — based on what you actually build.
Weekly milestones, press conference quotes, and franchise story events surface automatically. Your simulation tells its own story.
Local saves, IndexedDB (250MB), and GitHub Gist cloud sync. Rewind to any of the last 10 major decisions. Nothing gets lost.
Choose your team's weekly tactical focus — run-heavy, pass-heavy, blitz package, or prevent defense — before each simulation advances.
Veterans accelerate younger players' development during training camp. Managing your roster's age curve becomes a strategic tool.
Name your team, customize your city, set your colors. Your franchise, your identity — custom name and color theme applied throughout.
Free browser-based beta. No account required. Start a franchise and simulate seasons immediately.
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