Microsoft Xbox teamed up with American Express for the release of the video game HALO 4. For registered players in the U.S. who sync their American Express card to Xbox Live, rewards start at a US$10 statement credit from American Express and include $5 off a $10 purchase at AMC Theaters for those who complete the HALO 4 game. The promotion was also active in the UK, where participants get similar rewards from Carphone Warehouse, Cineworld and Dixon`s Travel. Players could trigger offers by meeting certain goals in-game. For example, finishing a Spartan Ops Mission on any difficulty level unlocks "Operation Completion." Players were rewarded with a Best Buy offer to get $50 off a $100 purchase (in the U.S.). UK gamers get a similar offer from Currys PC World. Another challenge, "Wake Up John," rewarded gamers for completing a campaign at the normal or harder level to get a $25 statement credit. HALO 4 released November 8, 2012.