Assassin's Creed Save Game Location
Windows
Assassin's Creed save games can be found here:
C:\Users\[user_name]\AppData\Roaming\Ubisoft\Assassin's Creed\Saved Games\
Linux
Linux (Proton):
~/.steam/steam/userdata/[user_id]/15100
Assassin's Creed save games can be found here:
C:\Users\[user_name]\AppData\Roaming\Ubisoft\Assassin's Creed\Saved Games\
Linux (Proton):
~/.steam/steam/userdata/[user_id]/15100