A new PC game that lets players rape and kill women as they progress through its story of 'violence, sexual assault, necrophilia and incest' is due to be released this month despite outrage.

The developer of 'Rape Day' claims the game is aimed at the 'four per cent of the general population [who] are sociopaths' and would enjoy playing a 'menacing serial killer rapist during a zombie apocalypse'.

Desk Plant, the one-man developer, even brags about its twisted story line in the description on gaming platform Steam.

Rape Day lets players rape and kill women as they progress through its story of 'violence, sexual assault, necrophilia and incest'

It wrote: 'Annoy, murder and rape women as you continue the story. It's a dangerous world with no laws. The zombies enjoy eating the flesh off warm humans and brutally raping them but you are the most dangerous rapist in town.'

In a gruesome screenshot uploaded to Twitter, one scene showed the main character forcing a pistol into a young woman's mouth with the subtitles: 'I could blow your brains out and f*** your tight little p****right here.'

The game also included a disturbing scene of a zombie drowning a baby before 'mashing it up into pulp'.

Steam has put the game under review after being inundated with complaints following its release on February 19.

The 'visual novel' - a genre where players change the plot based on their decisions - is currently unavailable to download while the gaming platform decides if it breaches its policies.

Steam strictly only bans games that are illegal or intentional 'trolling'. It's unclear whether the game constitutes trolling under Steam's rule.

While the game is under review, Steam has removed a scene which involved a baby being murdered.

The developer claims the game is for the 'four per cent of the general population who are sociopaths'

Questions are now being asked as to how a game titled 'Rape Day' with such a brazen description made it onto Steam in the first place.

According to developer guidelines, a game must pass through a 'brief review process' before it can go live.

But there is no suggestion that content is reviewed as part of the process.

In a FAQ, the developer said: 'If people want my game to not exist... their best offense in my opinion would be to not talk about me, and not give me free press.

'If both my game is banned and I am banned, then I will ensure that a content platform for all kinds of legal, quality porn games exist.'