Note: Doug's nickname on the ifMUD is Limax.
- untitled a.k.a. Planet Y (1999; TADS 2). Speed-IF 5.5.
- The Bloody Mess (1999; TADS 2). Speed-IF 7.
- The Living Room (with assistance from Peter Berman; 2000; TADS 2). Speed-IF 11.
- Toasterama (2000; TADS 2). ToasterComp.
- Asendent (with Nate Cull, both as "Sourdoh Farenheit and Kelvin Flatbred"; 2000; Z-code). IF Comp 2000: 51st place. Both names are plays on Rybread Celsius.
- Tapper (2001; TADS 2). IF Arcade.
- Ralph (2001; TADS 2). Speed-IF 15.
- Folkar Station (05-Aug-2007; TADS 3). IntroComp 2007: Honorable mention.
- Escape from Lowell Prison (01-Jun-2008; TADS 3). bouchercomp.
- For the Love Of Ornery Blue Yaks (07-Jul-2010; TADS 2). IntroComp 2010.
- Are You A Chef? (Adam Biltcliffe; 2000; Z-code). As Limax, tragically turned into a radish.
- Tragedy strikes at the XYZZY awards! (Adam Biltcliffe; 2001; Z-code). As Limax, he takes part in the prologue's dialogue.