Note: Zach's nickname on the ifMUD is vbnz.
- A Light's Tale (as "vbnz"; 2004; TADS 2). IF Comp 2004: 32nd place.
- On Optimism (as "Tim Lane"; 01-Oct-2005; Z-code). IF Comp 2005: 24th place, awarded Golden Banana of Discord.
- Distress (Mike Snyder; 01-Oct-2005; Hugo).
- Across The Stars (Dark Star and Peter Mattsson; 30-Sep-2007; Z-code 8). (Alpha-testing.)