Fallout 4 Spacemarine Vs a Tyranid???

In this video i face my first super beasty, but wait this doesn't look right why are Tyranids in this GaMe???!!!!!

Music:
Helldivers 2 - A Cup of Liber-tea by Wilbert Roget, II cover by Pianistec
https://open.spotify.com/track/38vIa3j2AlqcnWG2yKtdtn?si=c0210bf4df5441b7

Doom Eternal - Rip and Tear by Mick Gordan
https://www.youtube.com/watch?v=zZMg9ryeWOw&pp=ygUZZG9vbSBldGVybmFsIHJpcCBhbmQgdGVhcg%3D%3D