Just to clarify: The phrase "Island of the Sacred Beasts" appears in fan-fiction, some unofficial 3D art series, or adult CGI animations using Lara Croft's character model. If you've seen this title online, it's almost certainly unofficial fan-made content —often adult-oriented—created in software like Blender or SFM.
While traditional Tomb Raider games focus on high-octane gameplay and complex platforming, this 3DCG project focuses on: