Social and location mobile gaming specialist PerBlue has announced it has secured $800,000 in a funding round led by Golden Angels of Milwaukee.

With additional investment also sourced from groups in Seattle and San Francisco, PerBlue said its decision to follow the freemium model was making it an attractive proposition for investors.

Cash for the Kingdom"PerBlue has differentiated itself by making deeper and more innovative games than many of our competitors," said CEO Justin Beck.

"Our company's mantra of 'gameplay first' mixed with the virtual goods business model made PerBlue a great investment."

PerBlue's most successful title, Parallel Kingdom, has seen a release on both iPhone and Android, with the title using a player's GPS location to merge a virtual world with real life locations.

Players have to explore their local environment, encountering monsters and discovering treasure hidden in the city streets.

Back in March, PerBlue revealed the title's userbase had hit 100,000, with the firm claiming players had set up 1,015 different cities worldwide, claiming 425,000 km² of land across the globe.

PerBlue was founded in 2008 by University of Wisconsin-Madison graduates. The company has grown to nine full time employees and claims to be profitable.