Steam is offering the classic Left 4 Dead 2 for just £5.09, a 66 per cent saving on the normal £14.99 price.

Set in the zombie apocalypse, Left 4 Dead 2 (L4D2) is billed as a highly anticipated sequel to the award-winning Left 4 Dead, the #1 co-op game of 2008.

"This co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns," Steam notes in the game description.

The next generation co-op action gaming from the makers of Half-Life, Portal, Team Fortress and Counter-Strike, also comes with 'The Sacrifice,' a new add-on for Left 4 Dead 2.

'The Sacrifice' is the prequel to 'The Passing,' and takes place from the L4D Survivors' perspective as they make their way South. In addition to advancing the story, 'The Sacrifice introduces a new style finale featuring 'Sacrificial Gameplay' where players get to decide who will give their life so the others may live.

Full details can be found at the Steam website.

Left 4 Dead 2