Woot offers Armored Core VI Fires of Rubicon for $18.99 free shipping with Prime. 

Product Description:
A mysterious new substance was discovered on the remote planet, Rubicon 3. As an energy source, this substance was expected to advance humanity’s technological and communications capabilities. Instead, this substance caused a catastrophe that engulfed the planet and the surrounding stars in flames and storms, forming a Burning Star System. Almost half a century later, the same substance resurfaced on Rubicon 3, a planet now contaminated and sealed off by the catastrophe. Extra-terrestrial corporations and resistance groups fight over control of the substance. The player infiltrates Rubicon as an independent mercenary and finds themself in a struggle over the substance with the corporations and other factions. Pre-order to receive Melander C3 G13 Special Customization “Tenderfoot”.
 

• A new action experience from the makers of Dark Souls and Elden Ring
• Assemble and pilot your own mech
• 3D maneuverability to move freely through three-dimensional fast-paced missions
• Take on difficult challenges and overwhelm your enemies
• Infiltrate Rubicon as an independent mercenary