monospace · Velvetyne
Sligoil
Ariel Martín Pérez designed Sligoil as the interface monospace for the video game Unknown Number, where 'Sligoil' is the name of an evil fictional oil company. Its letterforms channel the culture of the British Isles — Matthew Carter's work, Irish whiskey distillery signage — plus the keycaps of MIT's vintage Space Cadet keyboards, and a 2025 update added Vietnamese support and two new weights.
Weights
Served as WOFF2: the same outlines the foundry drew, about 30% smaller over the wire.
Credit & license
Drawn by Ariel Martín Pérez, published by Velvetyne under the OFL-1.1 Open Font License. You can use it, freely. Get the files.
Pairs well with
New shapes, freely given
The five boxing wizards jump quickly over the lazy dog, and nobody had to ask a licence department first.
Work Sans — a plainspoken sans that gives Sligoil's eccentric mono room to be the voice.
New shapes, freely given
The five boxing wizards jump quickly over the lazy dog, and nobody had to ask a licence department first.
Source Serif 4 — an even-tempered serif for prose alongside game-flavored UI text.
New shapes, freely given
The five boxing wizards jump quickly over the lazy dog, and nobody had to ask a licence department first.
Archivo — a grotesque with enough presence to hold headlines over mono body text.
The x-ray
Same size, same baseline — Sligoil over Work Sans. Where they agree the strokes merge; where they argue, fringes.
“Hamburgefonstiv” is the type designer's test word — it carries most of the shapes that give a face away.