For me, the hardest levels are (based on difficulty):
- Cobraic Twilight (level 12-8, need to be fast)
- The Wrath Of Set (PSP version of the game, plenty of line merges for the Pharaoh difficulty. Only completed it once without line merges, all jewels and coins collected and with a score of 611,500 points)
- Opening of the Mouth Ceremony (Vertical horror)
- Weighting of The Heart from Luxor Amun Rising (level 8-7, 11-7 and 13-5 on hard difficulty, All difficulties for the HD version, without 100% accuracy, plenty of line merges)
- Village Of The Nile (Challenge Of Horus Mode, lost more than 100 times without any wins, without 100% accuracy, plenty of line merges)
- Hypostyle Hall from Luxor 2 (All difficulties for the original version, without 100% accuracy, plenty of line merges for hard and Challenge Of Horus Mode)
- Temple Of Hatshepsut (All difficulties for the original version, without 100% accuracy, plenty of line merges for hard and Challenge Of Horus Mode)
- Scarabic Dawn (All difficulties for the original version, without 100% accuracy, plenty of line merges)
- Guardians Of The Tomb (All difficulties for the original version, without 100% accuracy, plenty of line merges)
- Two Lands United (All difficulties for the original version, without 100% accuracy, plenty of line merges)
- Temple of Ra (duplicate of Scarabic Dawn only made easier by the relaxed accuracy scoring)