- O.G. Original Gamer by MC Lars (Ft. Jonathan Coulton)
- Oh, The Hilarity
- Oneonta (Eli Porter) by MC Lars (Ft. YTCracker) prod. by MC Lars, The Rondo Brothers & Sebastian Hochstein
- Origin of Species prod. by Baddd Spellah
- Overruled by The Department Of Darkness (Ft. Schäffer the Darklord) prod. by Vince Vandal
- Penny Arcade Theme
- Penny Arcade Theme (practice)
- Plastic Submarine by The Grammar Club (Ft. Beefy & Shael Riley)
- Power User prod. by Baddd Spellah
- Pr0n S0ng prod. by Baddd Spellah
- Problems: Mr. Cenac
- Problems: mr. mirman
- Problems: Ms. Schaal prod. by Baddd Spellah
- Question and Answer Time (Ft. John Hodgman)
- Rappers We Crush
- Rappers We Crush by Kompressor
- Revenge of the Nerds II by MC Lars (Ft. Beefy, The Former Fat Boys, LEX the Lexicon Artist, Mega Ran, Schäffer the Darklord, SkyBlew & YTCracker) prod. by Rich Matthew
- Rewind That Back