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Get Games has Defense Technica on sale for $7.49 (50% off) as the daily deal for 11/20/13. Uses Steamworks.
There’s also an Adventure Game sale going on. Save up to 80% off.
Corrosion $4
Dark Fall: Lights Out $2
Dark Fall: Lost Souls $2
Jack Keane $2.49
Jack Keane 2 $12
Kairo $1.24
Lucius $5 (Steam)
Montague’s Mount $6.69 (Steam)
RHEM 4 $4
RHEM Trilogy $4
Shadows on the Vatican Act 1: Greed $1.74
The Pahelika Collection $4
The Raven: Legacy of a Master Thief Deluxe Pass $22.49 (Steam)
The Raven: Legacy of a Master Thief Pass $18.74 (Steam)
Click here to see the Defense Technica daily deal and Adventure Game sales at Get Games.