Free digital collectible card game where you pick a historical leader and build a deck to battle in your browser
The free endless dive trivia game where the rarest answer wins
Stage
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Founded
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Based in
US
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Pricing model
Freemium
Free
Pricing
Free to play. Packs cost 4,400 gold (earned through play) or 440 gems (premium currency purchased with real money). Gems also purchase the Chronicler's Pass (battle pass) and cosmetics.
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Key features
Play in web browser on phone, tablet, Chromebook, Mac or PC with no download
Choose from six historical Leaders each with passive ability, Command and three Signature cards
Build 40-card decks from five colors representing different historical themes
Duel against AI on Easy, Normal or Hard difficulty
Play against other players in ranked matches or friend rooms
Free-for-All mode for 3 to 5 players
Draft mode to build fresh decks one card at a time
Guided First Chapter campaign teaching game rules
Real history sourced from primary and institutional sources
Parental controls and spending limits for younger players
Seven prompts per dive with 25 seconds each
Six rarity scoring tiers from Plankton to One in a Krillion
Ocean depth visualization showing score as metres descended
Five real ocean zones from Sunlit Shallows to Hadal Trench
Unlimited mode for endless practice dives
Daily dive with same prompts for everyone
Multiplayer with pass-and-play or online rooms
Practice mode with no time pressure
Question bank with 172 hand-built questions
No account required; play as guest
What makes it different
Real American history integrated into card abilities and deck building, not fictional or fantasy
Free to play with no cards sold directly; all cards earnable through gameplay
Installable as progressive web app with no download from app stores
Recommended for ages 7 and up with built-in parental consent and controls
Historical accuracy verified against primary sources with transparent sourcing
Rewards rare answers rather than just knowledge or speed
Never reveals answer lists to preserve mystery
Completely free with no premium tier or paywall
Score visualized as real ocean descent through five zones
Lost Chapters
Free Krillion