Excited About Triangles

#453
Nice Games Jam: "Excited About Triangles"
2026.10.15
A selfie with current Nice Games Club hosts with Ellen.

We welcome returning host Ellen Burns-Johnson back into the clubhouse today for a Nice Games Jam! Lydia provides the other three veteran podcasters with a prompt and helps shape this paper prototype.

The last time Ellen returned to the show was for the Serious Play Conference in 2025

Prototype Images

Prompt
Make me a game about geometry - the only math class I enjoyed taking! Feature at least one theorum or postulate in the mechanics. For example: the theorum of transitive properties (if a=b and b=c than a=c).
Game type
Tabletop game
Player count
2-4
Setup
  • Templated Library of shapes:
    • Squares
      • 3x3 square
      • 2x2 square
      • 1x1 square
    • Equilateral Triangles
      • 4 wide base equilateral triangle
      • 2 wide base equilateral triangle
      • 1 wide base equilateral triangle
    • Right Triangles
      • 3x3 right triangle
      • 2x2 right triangle
      • 1x1 right triangle
    • Parallelagrams 
      • 3x2 classic parallelagram
      • 2x3 classic parallelagram
      • Lydia-assisted rhombus
Rules
  1. Start with 5 random shapes 
  2. Randomly pick a criteria
  3. Must use at least 2 new pieces in your shape
  4. Mid-round you can trade up your shapes so long as they are of equal areas (eg. two 1x1 right triangles can be traded for a 1x1 square)
  5. Whoever finishes their shape first they get the card and their shape is “stuck” on the board
  6. Whose who did not get it can wipe their most-recent shape additions from their board
  7. At end of round get 2 new pieces each person, draw a new criteria
  • Criteria:
    • Convex (eg. a classic pentagon is a convex polygon)
    • Concave (eg. a star is a concave polygon)
    • Exactly 8 sides
    • <5 sides
    • >10 sides