| Title | Author | KB | Genre |
|---|---|---|---|
| X | Master Raze | 14.74 | Adventure |
| X - Demo Version | Joker9025 | 20.17 | Adventure, Demo |
| X Files Reopened 2: The Syndicate Strikes Back | BigtimeDudeProductions | 8.79 | Action, Comedy |
| X Files Reopened Bigger Version | TheBigtimeDude | 44.53 | Action, Adventure, Comedy |
| X Files Reopened Full Version with one new case & some Extra Dialogue | BigtimeDudeProductions | 45.45 | Action, Adventure, Comedy, Mystery |
| X race | Nuero | 13.69 | Racing |
| X-Caliber 2030 | Benco | 43.53 | Action, Comedy, Puzzle |
| X-Caliber 2030 Update | Benco | 43.66 | Action, Comedy, Puzzle |
| X-Factor: Part 1 | MDBowers, SMokey666 | 6.97 | Adventure, Fangame |
| X-Files | Ed Mueller | 18.3 | Adventure, Fangame |
| The X-Files | X-ZZT | 19.06 | Adventure, Fangame |
| The X-Files | Joyce Cheuk | 7.48 | Adventure, Fangame |
| The X-Files | Travis DuCote | 5.43 | Adventure, Fangame |
| The X-Files Reopened Demo | BigtimeDudeProductions | 7.07 | Action, Adventure |
| X-League (v1.2) | Kevin Anderson | 7.29 | Action, Adventure |
| X-League II: Search For The Diamond Sword | Kevin Anderson | 10.87 | Action, Adventure |
| X-Men | Ed Glaser | 9.13 | Action, Fangame |
| X-Men | -Yea |)og- | 14.08 | Adventure, Fangame |
| X-Men 2 | Ed Glaser | 8.72 | Action, Fangame |
| X-Men 2: The Apocalypse War | T-800 | 6.33 | Action, Fangame |
| X-Men 3: The X-Men Kidnapped... | Brutalhulk | 6.66 | Action, Fangame |
| X-Men 4: The Return of the Apocalypse....! | Brutalhulk | 6.29 | Action, Fangame |
| X-Men 5 | Brutalhulk | 5.58 | Action, Fangame |
| X-Men: Episode White | Aaron Linne | 16.66 | Adventure, Fangame |
| X-Men: The Adventures of Bishop | Unknown | 20.2 | Action, Fangame |
| X-Men: Version Yellow | Aaron Linne | 5.39 | Adventure, Fangame |
| X-SCAPE | Micro I-I Acker | 13.6 | Action |
| X-WOMEN | CK Tommy, Eric Park | 21.28 | Action, Fangame |
| The X: Art Fart's First Adventure | Eric Vealey | 8.33 | Adventure |
| Xanth | Shawn Hunt | 6.0 | Adventure, Fangame |
| Xaq's Very Mysterious Dungeon | Xaq | 9.56 | Adventure |
| Xaq's Very Mysterious World | Xaq | 41.6 | Adventure |
| xod | Dexter | 39.5 | Font, Puzzle |
| Xquest | Caspar | 16.96 | Arcade |
| Xquest 2 | Caspar | 23.25 | Arcade |
| Xtopia5 | m0sh | 3.82 | Adventure |
| XZR: Exile | _ry0suke_ | 243.84 | Action, RPG |