| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Ugly Oafs | Andrew Schultz | 2014 | English | |
| Ultimate Escape Room: IF City | Mark Stahl | 2017 | English | |
| Ultimo Jedi, El | Jose Vicente Ruiz (Joruiru) | 2013 | Spanish | |
| Uncle Clem's Will | Tony Rudzki | 2020 | English | |
| Under the Sea | Heike Borchers | 2019 | English | |
| Under They Thunder | Andrew Schultz | 2020 | English | Map, Solution |
| Under, In Erebus | Brian Rapp | 2010 | English | |
| Underground | Phlegethon | 2019 | English | |
| Unfortunate | Jess Elizabeth Reed | 2021 | English | |
| Unsägliche und Vermeidbare Tod des Matthias Claudius, Der | Christian Holmok | 2017 | German | |
| Unscientific Fiction | Tom Tervoort | 2009 | English | Solution |
| Untold Riches | Jason Ermer | 2015 | English | |
| Untold Story, The | Michael Pavano | 2019 | English |