CoD:MW3 is on sale for $29.99 (50% off) at GameStop as the daily deal for 10/15/12. The game uses Steamworks, so Steam activation is required.
In addition, there are some other deals floating around. Not sure what the weekly theme is yet. Looks like it could be an indie/space thing but you never know.
Update: Confirmed that there’s a Space Games Sale going on this week at GameStop.
SpaceChem = $4.99 (50% off)
Flatspace II = $6.23
Lost Empire – Immortals = $3.49
Perimeter – Emperor’s Testament = $3.49
Gratuitous Space Battles Collector’s Edition = $12.49
Gratuitous Space Battles = $9.99
Gratuitous Space Battles – The Order = $2.99
Gratuitous Space Battles – The Swarm = $2.99
Gratuitous Space Battles – The Tribe = $2.99
AI War / Gratuitous Space Battles Pack = $19.99
Lost Planet 2 = $9.99
Lost Planet Extreme Condition – Colonies Edition = $9.99
Endless Space – Emperor Special Edition = $23.44 – Steamworks
Endless Space – Admiral Edition = $20.09 – Steamworks
Starpoint Gemini = $6.79
Armada 2526 = $4.98
X-com Complete = $5.99
Sword of the Stars Franchise Bundle = $13.99 – includes below:
Sword of the Stars II: Lords of Winter = $10.49 – Steamworks
Sword of the Stars – Complete Collection = $6.99 – includes below:
Sword of the Stars = $3.49
Sword of the Stars: Born of Blood = $2.09