引用自 MakoSipper：

Actually, it happened once for me.

It's impossible. IM simulate game launch, but not actually running them.

What about free to play games like Team Fortress 2 or Dota 2?
Free to play games drop game cards based on your in-game purchasing. For every $9 USD spent (approximate) since the start of the Steam Trading Card Beta, you will earn one card drop. This card will drop at some point as you play. If you have made in-game purchases in Dota 2 or Team Fortress 2 prior to the Steam Trading Card Beta, or if you owned Team Fortress 2 prior to the Free to Play update, you will have 4 or 5 additional card drops available.

http://psteamcommunity.yuanyoumao.com/tradingcards/faq

What about free to play games like Team Fortress 2 or Dota 2?
Free to play games drop game cards based on your in-game purchasing. For every $9 USD spent (approximate) since the start of the Steam Trading Card Beta, you will earn one card drop. This card will drop at some point as you play. If you have made in-game purchases in Dota 2 or Team Fortress 2 prior to the Steam Trading Card Beta, or if you owned Team Fortress 2 prior to the Free to Play update, you will have 4 or 5 additional card drops available.

http://psteamcommunity.yuanyoumao.com/tradingcards/faq

引用自 Absurd Logic：

Does Idle Master trigger those?

Nope.

引用自 Shadok：

Btw, awesome FAQ in your profile dude ;D

引用自 ☮SamanthA☯winaskin.com：

I must own more games

^ this!

For what? o_O

Yep, believe me. Check the FAQ mate - http://psteamcommunity.yuanyoumao.com/groups/idlemastery/discussions/0/615085406651320102/

Buy more games, idle more cards.

You must own the game to idle cards, and no you can't idle them forever, and no you can't idle f2p games.

http://psteamcommunity.yuanyoumao.com/tradingcards/faq

Free to play games drop game cards based on your in-game purchasing. For every $9 USD spent (approximate) since the start of the Steam Trading Card Beta, you will earn one card drop. This card will drop at some point as you play. If you have made in-game purchases in Dota 2 or Team Fortress 2 prior to the Steam Trading Card Beta, or if you owned Team Fortress 2 prior to the Free to Play update, you will have 4 or 5 additional card drops available.

http://psteamcommunity.yuanyoumao.com/tradingcards/faq