Steam games DLCs

You can see what DLC you already have by right-clicking a game in your library and select 'view downloadable content'. The DLC you don't yet have are the ones not on there methinks

None that I know of. :-(

add all DLC to carts, and it will show you on the carts which u already own

I think the short answer is: no. It sucks. I would find this useful myself.

hichigo u cant do that :) there is no option to find what dlc u r missing. u must check every single dlc to findout

I hate you Hichigo ;3

Was suggested months ago to Steam

It's not all the efficient, but you can go to Steam Roulette. It lists all of your games (DLC included). This way you could see what DLC you have without having to check each game individually.

For example: using this, it took me maybe 5 seconds to find out which Magicka DLC I have and another maybe 20 seconds to search Magicka in the Steam store and see which DLC I don't already have.

i do it by adding all to the checkout, then it says "you already own this game" under those... you already own? :P
so just remove them. it's pretty helpful