Aperture Hand Lab

Aperture Hand Lab is a VR technology demonstration set within the Portal universe, designed to demonstrate the finger-tracking abilities of the controllers bundled with the Valve Index headset. The player takes on the role of a robot test subject at Aperture Science in a training exercise to test hand-based communication with a bunch of Personality Cores, spherical robots which each have a unique personality.

The player stands in front of one Personality Core at a time, following instructions to make hand-based gestures, with the game's announcer and Cores giving different responses depending on the player's actions (or lack thereof). There is no way to lose the game, and the entire experience can be completed in about 10 minutes.