Voskhod 2 (KSP 1.8.1/RSS/RO/Principia)

Voskhod was the Soviet Union's second manned space program, using Vostok capsules modified to hold up to 3 occupants. The Voskhod program set several firsts in the space race including first mission with more than one crew member, and the 2nd mission featured the famous first spacewalk by Alexei Leonov. Sadly, Alexei did not actually have a sweet jetpack.