I want to get trading cards for lots of games. I know I can idle in a game and earn my drops in it, but can I idle in multiple games at the same time and accrue drops for all of them?
The Simple answer is, Yes. But Games with Launchers are the Best to Idle in like: Borderlands 2 or Tomb Raider. Although you can Idle with Multiple Games you still have the droprate across all those games you have open, Which Means you won't be Earning more than having one game open. Also you will need a beefy computer to do this!