Does anybody know the solution?

[sunglasses.guy]

i just downloaded the game and it isn't working

[YouthfulCarrot]

What does your game directory look like, it might've not fully DL or extracted.
.

[KingRancher]

Mine also didn't fully download the BO1 and BO2 files. Is there a way to get them?

[WolflexZ]

KingRancher Yes, on steam. Plutonium doesn't support or give out game files.