Sources:
(Song) Chris Christodoulou - The Rain Formerly Known as Purple | Risk of Rain 2 (2020)
https://www.youtube.com/watch?v=EGXPAoyP_cg&ab_channel=ChrisChristodoulou
(Song) Team Fortress 2 Soundtrack | Rocket Jump Waltz
https://www.youtube.com/watch?v=kbdtBLD8Lbg&ab_channel=OfficialTF2Wiki
(Song) Team Fortress 2 - Rocket Jump Waltz Orchestra (Extended 6 minutes)
https://www.youtube.com/watch?v=Bj74XMIE7Dg&ab_channel=FedericoFontana
(Opening sequence) Risk Of Rain 2 – Early Access Launch Trailer
https://www.youtube.com/watch?v=IeLNqCrCtWs&t=41s&ab_channel=GameSpotTrailers
TF2 MannRobics GreenScreen BOTH TEAMS
https://www.youtube.com/watch?v=W_jPz7gxzA4&ab_channel=digitupminecraft