(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 | |
|---|---|---|---|
 | HyperBan by mormagli (on 20. June 2022, 23:33) | 15 |  96 % |
| What Do Little Killers Eat? by RockyRoer (on 14. October 2022, 03:47) | 68 | 96 % |
| Primordial Ooze by Kafkapharnaum (on 7. January 2023, 01:53) | 16 | 100 % |
| ZandwYch by ICHTUES (on 10. September 2023, 06:00) | 32 | 97 % |
| MILCHPRODUKT - Buchstabenrätsel / Letter Puzzle by DocLogic (on 6. October 2023, 13:56) | 31 | 97 % |
| Negative Energy by jojo81gaming (on 26. January 2024, 01:28) | 14 | 98 % |
| We Have Palindromes at Home by Kafkapharnaum (on 7. July 2024, 07:13) | 14 | 90 % |
| Quantum Superposition (Molecules, Whispers, Renban) by Crusader175 (on 22. July 2024, 16:00) | 18 | 92 % |
| Advent Calendar by Bearded Fool (on 1. December 2024, 12:00) | 96 | 97 % |
| Between a Relative and a Stranger by Elytron (on 30. September 2024, 00:47) | 17 | 98 % |
| fractionated recollection by aqjhs (on 20. March 2025, 07:05) | 14 | 92 % |
| Extreme Three Color Fun by ebiggie (on 30. May 2025, 00:11) | 80 | 93 % |
| Polymorphic Rooms (collab with yttrio) by Bellsita (on 6. August 2023, 02:40) | 121 | 98 % |
| Clasped Cages by Cane_Puzzles (on 5. December 2021, 17:14) | 37 | 94 % |
| Schlangennest — mal anders by glum_hippo (on 19. March 2022, 16:57) | 43 | 96 % |
| Squiggles (Grkles Collab) by Niverio (on 15. June 2022, 00:37) | 38 | 97 % |
| Minister of Primes (featured on CtC) by Mountainfarmer (on 6. August 2022, 11:19) | 38 | 94 % |
| Double Decker Sandwiches by RockyRoer (on 19. November 2022, 12:58) | 39 | 94 % |
| Cavino Royale (Canal View Nonogram) by PrimeWeasel (on 22. April 2024, 09:23) | 40 | 99 % |
| Killer ratio by jcgodart (on 23. October 2024, 09:38) | 35 | 92 % |
