No, sadly, Cross-buy is not available for Onward. The reason for this is that the two versions, the PC and the headset versions, might be similar in gameplay. Regardless, they have vast graphic fidelity differences and, most notably to why Cross-buy is not available, were made by different developers. In my personal opinion, you should only buy the PC version of Onward if you have a choice. A headset version is available and is regarded as passable beyond its graphic problems. Still, there are better options out there for the headset. While the PC version has fantastic graphics and is a very worthy shooter in its own regard. Get the PC version.