Just Cause 3 (Steam) - £1.79 @ Steam

XXL edition £3.10 also

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info added by @wadz

The Mediterranean republic of Medici is suffering under the brutal control of General Di Ravello, a dictator with an insatiable appetite for power. Enter Rico Rodriguez, a man on a mission to destroy the General’s hold on power by any means necessary. With over 400 square miles of complete freedom from sky to seabed and a huge arsenal of weaponry, gadgets and vehicles, prepare to unleash chaos in the most creative and explosive ways you can imagine.

FEATURES:

• Explore a Mediterranean island paradise with complete vertical freedom – skydive, BASE jump and free dive in an open world with virtually zero limits
• Glide through the air and swoop across mountains with your Wingsuit giving a new way to rain death from above
• Use your Grapple and Parachute to scale buildings, hijack vehicles, move quickly or tether objects together for creative new ways to cause Chaos.
• Cause massive chains of destruction in military bases, harbours, prisons, police stations and communications facilities to bring down a dictator
• Arm yourself with a wide range of explosive weaponry from shotguns and missile launchers to tank-busters and air-strikes
• Choose from a huge variety of different vehicles to drive including speedboats, jets, helicopters, turbo-fuelled sports cars and super bikes
• Get adventurous with dozens of challenge missions and collectibles to discover
• Online community features

SYSTEM REQUIREMENTS

• MINIMUM:
  
  • OS: Vista SP2 / Windows 7.1 SP1 / Windows 8.1 (64-bit Operating System Required)
  • Processor: Intel Core i5-2500k, 3.3GHz / AMD Phenom II X6 1075T 3GHz
  • Memory: 8 GB RAM
  • Graphics: NVIDIA GeForce GTX 670 (2GB) / AMD Radeon HD 7870 (2GB)
  • Storage: 54 GB available space

• RECOMMENDED:
  
  • OS: Vista SP2 / Windows 7.1 SP1 / Windows 8.1 (64-bit Operating System Required)
  • Processor: Intel Core i7-3770, 3.4 GHz / AMD FX-8350, 4.0 GHz
  • Memory: 8 GB RAM
  • Graphics: NVIDIA GeForce GTX 780 (3GB) / AMD R9 290 (4GB)
  • Storage: 54 GB available space

Gamespot review -