Galactic Civilizations III at 70% off: $12.00 or $40.32 (66% off) for the Gold bundle. The Retribution Expansion that releases today is also on sale at 10% off.
BATTLETECH at 40% off: $23.99 to $71.99 (20% off) depending on edition. Some DLC also on sale at 10-30% off. Free weekend.
Starpoint Gemini Warlords at 80% off: $6.99 or $16.42 for the Gold Pack. DLC also on sale for 66% off.
Starpoint Gemini Franchise Bundle at 82% off: $25.60.
TerraTech at 40% off: $14.99 or $17.39 for the Deluxe Edition. DLC also on sale. Free weekend.
Relevant OCC Reviews: