As a player character:
- The Incredible Erotic Adventures of Stiffy Makane (Mark Ryan; 1997; AGT).
- Stiffy Makane: Mystery Science Theater 3000 (Dastardly Coward and Adam Thornton as "Drunken Bastard"; c.1997; Z-code).
- Stiffy Makane: The Undiscovered Country (Adam Thornton; 2001; Glulx).
- Mentula Macanus: Apocolocyntosis a.k.a. Stiffy Makane: Apocolocyntosis (Adam Thornton as "One of the Bruces and Drunken Bastard"; 2011; Glulx). This version of Stiffy—actually, Stiffy's ancestor, Mentula Macanus—won the Best Individual PC award from the XYZZY Awards 2011.
- The Cavity of Time (Sam Kabo Ashwell; 2011; Undum; Web browser);
As an NPC:
As a reference only:
- Competition '99 (Lucian Smith; 1999; Z-code). In the list of fake games entered in the then-future IF Comp 2006, one of the games listed was Stiffy Makane: Hyperspace Edition (Big Richard; 2006; AGT).