I posted this to steam forums for help and tips with steam:
"Steam has failed to record in my inventory that I have certain new items in a game.
On Jan 23 Killing Floor 2 had a Community Gratitude Giveaway event where several items where given away to players of their game across all platforms, including Steam.
When I logged onto Killing Floor 2 on Jan. 23 Steam's servers crashed/failed/went down at almost the same time.
As a result Killing Floor 2 has recorded that I received the free items
But
Steam has totally failed to record that I received the free items.
I have submitted 2 support tickets to Tripwire for Killing Floor 2 about this issue but they say that I have received the items and tried to consider the matter closed.
My Steam inventory still has no record of the items being granted to me.
What do I do? What can be done?
I have restarted my computer, I have uninstalled and reinstalled Killing Floor 2, I have submitted 2 support tickets about this issue to the makers of that game and I have posted on multiple discussions concerning that game and on Tripwire's (the makers/owners of Killing Floor 2) forums.
Tripwire says I have the items. Steam definitely shows I do not and I definitely do not have them inside my game. What now?"
I received 3 replies from 2 people saying that this is not Steam's problem and that I should contact the maker of the game.