You prolly need to update your sync. Or you have a special edition of the game (all DLC) which is a different store item.

It could also be due to the fact that this giveaway is for the original Darksiders II, and the version on Steam is now Darksiders II: Deathinitive Edition.

I own the Deathnivitive Edition, but don't know what the differences between the two versions are.

Regardless, I won't be entering this giveaway.

Just a friendly heads up, since I see you are new here – you are not allowed to do that. :)

All wins have to be activated on the account linked to your profile here. Normally you wouldn't be able to enter in the first place, but there seems to be a bug in this case, given the game also requires zero points to enter.