Bestiary

Two medieval scholars duel by combining creatures from a shared book. Your advantage is what you learn and remember.

Both players draw from a shared codex of creatures. To win, you need to learn which creatures can be fused and how to use the results.

The combinations draw on different ways of understanding nature in medieval bestiaries. A Monk, a Poet, and an Encyclopaedist can read the same creature differently.

Progress opens up more creatures and combinations to discover. It gives you a wider world to learn, rather than stronger cards simply for having played longer.

My role

I designed and built the game with AI assistance.

The demo

Closed, by invitation · 10 – 26 August 2026

Players

22, all invited

Play

1,028 duels · 66 hours of dueling

Time

44 minutes on average, on the days a player played

Returning

Day 1: 12 of 22 (55%) · Day 7: 5 of 20 (25%)

Fusion success

54% in the first week, 60% in the second

Concentration

7 players account for 82% of dueling time

Revenue and ad spend

€0