Tesco Entertainment are selling "Armored Core 4" for the Sony PS3 for £13.97.
Use the code "Freedel" for free delivery.
You can get cashback through the usual sites (e.g. 7% Quidco, making it just £12.99)
The next best in-stock price seems to be £22.24 from CHIPS.
Six corporations banded together to overthrow the establishment with their superior breed of Armored Core mechs, yet the renegade ravens aren`t going quietly. Engage in a realistic and diverse world facing the challenge of new enemies on the battlefields driven by cutting edge technology.
Customise your AC from a redesigned line up of parts, creating an unstoppable mech ready to take on your enemies. The Armored Core series explodes onto the next generation systems delivering turbo charged, high intensity gameplay.