Instead of reaching out a physical arm, you’ll look at a ledge or crevice to center one virtual hand over it, then hit the corresponding trigger to pull yourself up. The key mechanic is a fatigue system that kicks in whenever you’re hanging from one hand, giving you a few seconds to anchor the other one and recover. You can buy more time by stopping periodically to rub your hands with chalk — using another controller button — or by carefully half-releasing a trigger, gaining stamina but risking a fall. To grab particularly distant ledges, you’ll need to press a button to jump, throwing yourself off one side of a cliff and hoping to get a good grip on the other.
See the full story here: http://www.theverge.com/2016/4/28/11526150/crytek-the-climb-vr-oculus-rift-review