Santa Monica studio community manager is posting.
Santa Monica did God of War series.
Gif shows someone taking a step.
Caption says to take a step for the fragment.
Assassin's Creed features both steps and fragments.
Kratos vs Desmond crossover confirmed.
Edit: my sources tell me it's not Desmond. You play as Achilles, an assassin known for defeating the templar Hector of Troy. Featuring a hack and slash open world stealth game.