Unreleased episodes

Throughout the history of Game Grumps, there have been many unreleased episodes. These are usually never uploaded to YouTube for two main reasons: lack of quality or technical errors.

Conker's Bad Fur Day
Conker's Bad Fur Day was played early on Game Grumps. In Mountain out of a Molehill, the Game Grumps state that due to the game's slow and dialogue-heavy start, there was not much discussion. At his Shadocon 2012 panel, Egoraptor calls the series depressing, because of the incredibly sour experience JonTron had (as Jon, who had considered the game in high regard, now understood Arin's opinion on the game). Arin referred to their playthrough of the game as the worst experience they had ever done for the show.

Demon's Crest
Demon's Crest was attempted by the Game Grumps. While Arin enjoys the game, Jon formed a different opinion on the game while recording. The episodes lacked jokes, and as a result, were not uploaded, as revealed by Arin at his Shadocon 2012 panel. The episodes were mentioned during the Yoshi's Island playthrough, where Arin revealed he did not think the comedic material was good enough for his standards, while Jon thought the jokes were good.

Sonic Adventure 2
Sonic Adventure 2 was mentioned by Arin on Twitter. After Arin downtalked the Sonic Adventure series, and a slew of fan-hate followed, Arin revealed on a tweet that he and Jon played the game, and Jon realised the game was not as great as he remembered. It was unclear if they were recording their playthrough for Game Grumps or not.

Dino City
Dino City is another game the Grumps attempted to play. As Jon had done a review of game, their commentary consisted of them referencing Jon's review, confirmed at MAGFest 11.

Super Metroid
Super Metroid is one of games the Game Grumps lost the footage of when Arin's computer died. They confirmed they played it in Never Seen It, weeks after mentioning the incident in their Wheel of Fortune playthrough, which was done to make up for the lost episodes. They said that they definitely want to play the game again on the show.

Strider 2
Strider 2 is a game the Game Grumps had played, although they lost the footage. This was mentioned in, where the Game Grumps said Barry could possibly salvage the footage; Barry was unsuccessful. The Grumps said the want to replay the game once it is no longer fresh in their minds.

Replayed games
Sometimes after not releasing a playthrough, the Game Grumps rerecord it and release it.
 * Zelda: A Link to the Past and Mega Man 7 - These games, and likely others, were played as trial runs for Game Grumps.
 * Mario Party 4 - The gameplay of the original playthrough was not recorded, although the Grumps still had the audio of their commentary.
 * Sonic '06 - Partway into Sonic '06, the Grumps lost some footage and had to start their playthrough over.
 * Nickelodeon Guts - The original playthrough was not uploaded due to capture failing.