Telling the traumatic story of a mother and her child in a zombie apocalypse, survival game Undying is free via the Epic Games Store this week.

Gamers who play on PC have a limited opportunity to claim a zombie survival game for free, but the offering will not last for long.

It puts players in the role of a survivor during the zombie apocalypse. From there, players face levels where they first plan the type of defences they want to plant – sand barrier, barrel bomb ...