(Very) Hard AND nice puzzles
The following list contains portal puzzles that have been rated as nice or very nice and that are difficult. These puzzles are recommended for experts - and allow some time to solve.
| Description | solved | Rating | |
|---|---|---|---|
 | Mind the Gaps by jwsinclair (on 20. September 2022, 18:32) | 17 |  98 % |
| Contained Chaos by fritzdis (on 8. December 2022, 22:26) | 39 | 96 % |
| Clone College by SSG (on 17. January 2023, 07:17) | 38 | 95 % |
| Star Killer Part 5: Hull Breach by FischmitFahrrad (on 7. January 2024, 20:00) | 19 | 98 % |
| Whispering Snakeban by yanggang (on 26. April 2024, 19:31) | 16 | 98 % |
| Slingshot Skirmish 5 - Siege Tactics by Allagem (on 10. May 2024, 13:37) | 34 | 95 % |
| Focus on Symmetry by Mad-Tyas (on 4. October 2024, 10:26) | 53 | 94 % |
| That Yarn Cat! by Sotehr (on 27. April 2025, 03:27) | 15 | 91 % |
| Set Apart by WEBthe3rd (on 9. December 2025, 19:15) | 21 | 91 % |
| Someday We'll Meet Again by twototenth (on 29. August 2023, 08:00) | 105 | 97 % |
| Competitive Tetris by Bremster (on 23. September 2022, 09:00) | 83 | 93 % |
| RAT RUN: One Year Earlier by marty_sears (on 6. May 2026, 01:57) | 323 | 97 % |
| X-sums Parity Confetti by Playmaker6174 (on 24. January 2022, 08:32) | 33 | 99 % |
| Shuriken by crispy16 (on 24. May 2022, 19:43) | 41 | 94 % |
| Double Dip by zetamath (on 21. June 2022, 19:38) | 79 | 97 % |
| Chaos Construction: Ariadne's Pet Dinosaur by Myxo (on 24. June 2023, 13:08) | 112 | 95 % |
| Mystery Lines Somedoku by blackjackfitz (on 11. September 2024, 18:29) | 39 | 94 % |
| I Only Have Eyes For You by juggler (on 24. May 2024, 17:47) | 60 | 98 % |
| Vaults of the Heavens by Blobz (on 16. June 2025, 16:00) | 65 | 95 % |
| Killer X Sudoku #2 by Phistomefel (on 3. February 2020, 16:17) | 109 | 90 % |
