Steam

If you think vermintide in any way resembles a milsim tactical combat game, you are either delusional or have never played like RavenShield, SWAT 1 or 2, Tom Clancy's Rainbow Six (not fucking Seige), the ARMA series, even Squad, or Americas Army or hell even the NeoTokyo mod for HL2 way back in the day, or anything like that.

Vermintide is basically L4D2 with a thematic facelift.

Tooootally not a milsim or squad based tactics game where planning, preperation and training are key because one or two minor mistakes and basically mission fail, everyone dies.

MilSims and Tacitcal Squad Based Combat games are hugely defined by very tense periods of going as by the book as you can, punctuated by extremely intense moments that you often cannot predict will occur.

Vermintide, like L4D2, is more or less long sustained periods of intense, largely unrealistic, much more forgiving (far lower average TTK for the player) combat, with many more fantastical elements, and then the down time is generally minimized, unless you are an absurdly good team or are astoundingly lucky.