Which games do you want to have Steam Workshop?

Torchlight 2 when it is released.

Everygame :/ its really easy and works well just wish most supported it and was multiplayer

I forget which one of the Terraria devs but one of them has a new project Starbound. I'd love to see that with Workshop.
Also Torchlight 2 since that has mod support.

Fallout 3, and New Vegas.
Because why not.

Every game that you can download maps or mods.

Borderlands, Left 4 Dead 2, and Killing Floor.

Solitare.

portal (1) , left 4 dead 2 and dota 2 xD and the binding of isaac

Oblivion, Fallout 3 & Fallout New Vegas

Saints Row the third