We previously announced the pre-order bonuses available from retailers, primarily being skulls unlocked in Halo 2 Anniversary, however, Game.co.uk has announced two special editions for the Master Chief Collection exclusive to the UK through their online store: The Limited and Mjolnir editions. The Limited Edition, pictured above, includes the Grunt Funeral Skull, which will be made available to everyone a month after the game’s release, a physical map book of every map in the game, which is also available from Best Buy, and the exclusive steel book case only available
to the UK through Game. The Mjolnir Edition includes everything in the Limited Edition plus the Master Chief 12″ Artfx Statue, which is available separately from different retailers for $149.99. The Mjolnir Edition is already sold out as of when this post was published, but Limited Editions with the exclusive steel book case is still available.
UPDATE: You can purchase the game outside the UK for an additional £2.49-£4.99 for international shipping.