Video game giants Blizzard and Activision have announced an $18 billion merger. The two new found partners claim that the merger creates "the world's most profitable games business."

The companies behind Call of Duty and World of Warcraft are merging in a deal which could shake up the global video games industry.

Activision and Blizzard have said they will form "the world's most profitable games business" in a deal worth $18.8bn (£9.15bn).

US-based Activision also makes hit console games such as the Tony Hawk series and Guitar Hero.

Nine million people pay a monthly subscription to play World of Warcraft.

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