(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 | |
|---|---|---|---|
 | Secret Caverns by GarlicBredFries (on 31. October 2022, 23:25) | 29 |  92 % |
| Contained Chaos by fritzdis (on 8. December 2022, 22:26) | 31 | 97 % |
| Metroid by Kafkapharnaum (on 30. December 2022, 17:24) | 26 | 99 % |
| Geometry Exam #4 by Blashyrkh (on 19. November 2023, 17:13) | 32 | 92 % |
| Ulte Nus Plura (Suguru Chaos Deconstruction) by crispy16 (on 2. May 2022, 15:57) | 56 | 99 % |
| Things in common by arbitrary (on 22. April 2024, 11:50) | 64 | 98 % |
| Schatzsuche (2001) - Rundweg knapp daneben by AI1463 (on 6. July 2014, 14:06) | 28 | 97 % |
| Nurikabe Killer Sudoku by udukos (on 26. December 2020, 16:33) | 59 | 98 % |
| Lockout Flower by FryTheGuy (on 27. September 2021, 19:04) | 31 | 98 % |
| Build Your Own Killer: Moral Dilemmas by Playmaker6174 (on 6. May 2022, 19:02) | 28 | 99 % |
| Chaos Construction: Arrow In-10x10-sity by XeonRisq (on 21. August 2022, 04:00) | 29 | 99 % |
| Lines And Circles by Jeet Sampat (on 8. April 2023, 13:18) | 27 | 94 % |
| Near and far (Kropki pairs/Remote sums/X-sums) by dumediat (on 26. May 2023, 13:54) | 29 | 98 % |
| Build Your Own Killer: Master Designer by Playmaker6174 (on 15. August 2023, 06:00) | 58 | 94 % |
| Schrödinger 202: Atomic Structure by ViKingPrime (on 24. September 2023, 21:00) | 27 | 98 % |
| Wichtel 2016 (10): Kakuro-Hitori by wichtel (on 13. September 2017, 02:02) | 56 | 96 % |
| WORTMISCHUNG - 3D Buchstabenrätsel / letter puzzle by DocLogic (on 26. January 2020, 00:52) | 31 | 98 % |
| Double-or-nothing by tesseralis (on 13. August 2022, 09:30) | 30 | 95 % |
| Shady Combination #2: Country Road, Heyawake, LITS, Yin Yang by Myxo (on 24. January 2023, 16:12) | 30 | 96 % |
| Quadrature by Jay Dyer (on 6. February 2023, 23:33) | 64 | 95 % |
