Humble Sierra Bundle (pay what you want and help charity) Digital Steam games at humblebundle.com

$1 Tier
Space Quest Collection
Phantasmagoria 1 and 2
Police Quest Collection
Shiftlings

Beat the average tier
Acranum
Time Shift
Quest for Glory 1-5
Gabriel Knight 1-3

$15 Tier
Caesar 3 and 4
Geometry Wars 3
King’s Quest Collection
Velocity 2X

$20 Tier
King’s Quest Collection (new episodic game)