Wasserman Experience devised the activity as part of a new campaign for the brand, which is looking to promote the game among new players in the UK.
The activity has been delivered to tie-in with the game’s first ever British television commercial, which aired at the end of April.
The battle took place during rush-hour in London and was captured on film for amplification across social channels.
Starting at St. Katherine’s Dock, the knights, led by their king, marched through city’s streets, across Tower Bridge to Potter’s Field where they battled huge lava monsters on the bank of the River Thames.
Onlookers were also invited to take part, and were given swords and armour.
After the battle a free event was held on Potter’s Field, where the knights mingled with members of public, over ales and a hog roast, to celebrate their victory.
The knights will also be roaming the streets of London over the next three weeks, causing mischief in order to maintain awareness and excitement about the game, said Wasserman.
Qianya Liu, overseas marketing manager for Clash of Kings, said: "With this activity we wanted to bring to life the excitement of the game, putting the action into a real world environment, set against the backdrop of one of London’s most iconic landmarks."
Simon Couch, business strategy director, experience at Wasserman said: "Sixty-five per cent of all UK Clash of Kings users play on their commute to and from work, so it made perfect sense to stage a huge battle for people on their way home.
"Merging the physical and digital experience, we captured the action, excitement and enjoyment experienced by players of Clash of Kings – helping to boost awareness of the game with new audiences."
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