[Suggestion] Add manually the DLCs you have to the Sync page.

Yeah, you can do what centurion said.

Go to its storepage and it'll tell you there if you own it or not. Alternatively, if you have the Steam client on, right-click on the game -> Properties -> DLC.

I use the Ignore option of the Zo's addon, but everytime I restart the browser I have to add it again. (I use the porn mode)

And another suggestion... WHY IM SO UNLUCKY? I ENTERED OVER 9000 GIVEAWAYS, FUCK THIS SITE, BAN CG AND LOKO.

lolnope

And, um, you can read the whole thread before posting. Simple. Also, bump

Which is great if you never leave home and never have to use a friend's/family member's/work/school computer...

SG Addon Filter does exactly what you want.

It's hard, because the AppID of the DLCs is the same as the games AppID, and it can't sync to SG. Or at least I think is that the problem.

Yeah I want this feature

Heh, well remembering all 668 games I own is a bit tricky. I see deals for games all the time that look good, only to click on the page and discover I already own it ><.

Yeah, but come on, this is especially difficult if you wait and buy a GOTY version or bundle version of a certain game which includes all/most DLC, e.g. Civ 5, Magicka etc., because you never had to make a conscious decision to buy any particular DLC. It's not helped by the fact that to find what DLC you own, you have to go to Library > Find the Game > Right Click > View Downloadable Content.

"due to malformed app-IDs"
Or, hell, non-Steam-owned Steam games...I've bought a number of games retail, before the internet was wide enough for two games to pass and it would be good to exclude them. E.g. Hitman, Wolfenstein etc.

I looked for thread suggesting this, but not for a suggestion thread. Thanks.