Gaming charity Playmob has partnered with ocean preservation collective We Are The Oceans to launch a new playable ad campaign designed to raise awareness of climate change issues affecting Small Island Developing States.

The ad takes the form of a tower defence game called Island Nation Defense and is developed by ad technology firm TreSensa. It will be pushed out across the Playmob Network, which has a reach of over 150 million users.

Island Nation Defense isn't the first playable ad to come from Playmob and WATO. Its most recent ad, The Big Catch, saw 3.2 million plays with an average playtime of one minute 13 seconds.

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"Game makers have an incredible opportunity to provide their audiences and fans with positive messages, offering them engaging content that not only helps their own bottom line but increases their brand value through the enabling of social change," said Jude Ower, Founder and CEO of Playmob.

"Equally for NGO's, foundations or even brands with a social message who want to reach, engage and mobilise individuals and communities, there is arguably no better route than through gaming."

Playmob has experimented with different ways of raising money for charity, once partnering with Rovio for a sponsored IAP event in its game Angry Birds Epic. The partnership raised $85,000 for the reading charity Room to Read.