Deep Silver is offering Dead Island Riptide for free this weekend via Steam for PC.
Anyone with a Steam account can download and play the game at no cost until 1pm Pacific (9pm UK) on Sunday, September 29.
If you decide to buy it before the cut off point, you'll be able to get it at a 66 per cent discount ($13.59, down from $39.99).
Dead Island Riptide is the second game in the zombie survival series, and released in April 2013 to mixed reviews.
In our Dead Island Riptide review, we said that the game is "swamped by familiar flaws". See what other reviewers thought in our Dead Island review round-up.