Also Enemy Front for £1.71http://www.oneplay.com/uk/download/details/11747_Enemy_Front__PC_/
Don't know why it says trilogy!?
Sniper Ghost Warrior
When the democratic government of Isla Trueno is overthrown, an aggressive and hostile military command rises to power. A highly trained special ops unit is sent in to help the rebels accomplish objectives that only a sniper can handle. In addition to intense sniper missions, players will also take part in a variety of assault scenarios where their prowess with weapons will be a huge help to the undermanned rebels. Sniper: Ghost Warrior seeks to challenge players in new ways so that the game is both demanding and entertaining.
Sniper Ghost Warrior 2
Sniper: Ghost Warrior 2 is the only multi-platform, first-person, modern shooter exclusively designed around the sniper experience. It takes the bulls-eye precision of its predecessor to new and exciting heights, offering more diverse sniper challenges; a rebuilt AI system and the thrilling “one shot, one kill” precision that made the original a huge hit, selling 3 million copies worldwide. Taking advantage of the advanced capabilities of the CryENGINE3, Sniper: Ghost Warrior 2 also delivers striking graphic environments.