The 1.5.1 update was a standard patch for the PC version of the game. Key fixes included:
Assassin's Creed Origins - 1.4. 3 | 1.5. 1 Patch Notes * On Tuesday, May 15 we will be deploying Patch 1.4. 3 for Xbox One & PS4 | Reddit·r/assassinscreed Assassin's Creed Origins - 1.5.1 Patch Notes Assassin’s Creed Origins Free Download v1.5.1 (...
Resolved issues where certain achievements like "Serqet's Carapace" would not unlock. Assassin’s Creed Origins Free Download v1.5.1 (...