Data Sources

Patch Data

Balance change data comes from official Marvel Rivals patch notes and community-maintained balance changelogs. Each patch is parsed into structured records: buffs, nerfs, and adjustments classified by category (Damage, Health, Ability, Ultimate, Mobility, Cooldown).

Meta Data

Competitive meta tier data is sourced from marvelrivals.gg — a public competitive tier list. Data includes tier classifications, win rates, pick rates, and ban rates where available. Snapshots are loaded from a curated JSON file and updated periodically.

Hero Data

All 40 Marvel Rivals heroes are tracked in the BuffTracker database. Patch history is cumulative — every change from every parsed patch is preserved, enabling trend analysis across multiple balance updates.

Provenance

Verified (36 heroes)

Directly transcribed from public tier list sources with specific win/pick/ban rates. Source attribution and snapshot date preserved.

Estimated (4 heroes)

Emma Frost, Blade, Deadpool, and Ultron have estimated tiers. The primary source does not include these heroes. Estimated tiers are manually assigned and clearly marked on hero pages. They carry no win/pick/ban rate data and may be updated when source data becomes available.

Attribution

BuffTracker recommendations are derived from patch impact (65%) and meta context (35%). External tier data is always attributed to its source. BuffTracker does not claim third-party competitive data as its own. All analysis is deterministic — no AI generation.