how do i see which games have cards?

Like this ;)

There might be other way to check if a game has cards, but I always go and check the game's Store page.

Trading Card List, Complete & Up-to-date

Here.

you can make a catagory called TCG and everytime you buy a game that has cards you put it in there.
and if you collected all cards from the games you have they are listed under badges > View my booster pack eligibility.

On steam store page, like TheNamelessGuy said or here.

In Here

PD: Seems you only want to see your games, so in badges page

Easy, just go to main store page. Click on games pull down menu, browse by genre like action, on the right you will see (in find more section) single player games & click that. This is a longer way to the advanced search page, just click the action genre to genre clearing that out, then goto category & pick steam cards. This will give you a full list in the store plus you can sort it by price.

To see which games you have cards for, look on the top bar & on your profile name, just click on badges. Shows what you have to still get the free cards for playing & what's all there.

thanks a lot!

2 questions:

1 how do i know how to unlock cards in a specific game?
2 you cannot collect all cards as i see yourself? what advantages do badges give you at all? i sell the cards mostly for 10 cents or something.

Or go to your profile, click badges and ou can see what has cards and how many drops you have left.