By purchasing the game legitimately through Steam, you're not only protecting yourself from these dangers but also supporting Croteam, the developers who've brought this classic franchise into the VR era. With frequent sales that often discount the game by 70-85%, you can enjoy the full, safe, and stable Serious Sam VR experience for a price that's surprisingly affordable.
Before you consider any method of getting the game, you need to ensure your computer is up to the task. Here are the official system requirements as listed by various sources: