[UPDATE 2] Assassin's Creed Unity, Far Cry 4, and The Crew have now returned to Steam. It remains unclear why they were removed.

[UPDATE] Following the publication of this story, it was brought to our attention that games such as Assassin's Creed Unity, Far Cry 4, and The Crew are also unavailable through Steam's United States store. GameSpot has contacted Ubisoft for comment and will update this page with anything we hear back.

The original story is below.

Three of the biggest Ubisoft games still due for release this year will not be arriving on Steam in the UK, the publisher has confirmed.

due to disagreements over DLC royalty rates.

Steam owner Valve has run into various disputes regarding EU law in the past.