Update:

Microsoft has issued a statement confirming the price rise, suggesting that the original listing was due to a promotion.

"Pricing for select digital content in some markets has changed since launch," it reads. "Digital content pricing is subject to change and we may occasionally offer various deals or promotions. Ultimately pricing and promotions will vary by region."Original story follows.

Microsoft has raised the price for some of its exclusives on Xbox Live by £5.The unexplained change came into effect yesterday, and saw games including Dead Rising 3 Forza Motorsport 5 and Ryse: Son of Rome go from costing £44.99 to £49.99 when purchased online.Oddly, other Microsoft-published games like Crimson Dragon, Dead Rising 3: Premium Edition, Lococycle, Powerstar Golf and Zoo Tycoon have seen no such price increase.We've contacted Microsoft to try and discover whether the change is permanent, what motivated it and whether other territories should be expecting similar hikes. We'll update the story as soon as we hear back.

Luke Karmali is IGN's UK Junior Editor. Some people say he looks like Tom Daley. You too can revel in mediocrity by following him on IGN and on Twitter