A text with no font uses Nacatamal Arcade, the engine's own: two-pixel stems, cut corners, 8 × 8 cells. Two more come with it, named by key and with nothing to load: font: 'nacatamalon:square', the same weight with square corners, and font: 'nacatamalon:thin', one-pixel strokes and narrower.
The three have the same characters: lowercase, accents, ñ, ¿ and ¡, and the icons for prompts on screen (← → ↑ ↓ ▲ ▼ ◀ ▶ Ⓐ Ⓑ Ⓧ Ⓨ ★ ♥ ● ■). They are drawn for the engine and under its own licence, so a game that uses them owes no credit. drawText and a saved scene name them the same way.