Linux-friendly studios in Europe

Hey! I'm going to finish up university soon and as part of that I'm required to do an internship related to C++ development. I'd love to do something in the Linux gaming space and help promote it that way, but I'm not aware of many studios in Europe that are big enough to take interns. So I turn to Lemmy: what are some studios that may be open to Linux development, either through supporting it natively or creating/improving developer tooling on Linux?