Japanese social games firm DeNA has invested in Office Heroes creator Astro Ape.
The developer, founded in 2009 and based in the US, will now create products for DeNA's iPhone social network MiniNation.
"Astro Ape represents yet another step in our X-border X-device strategy of bringing battery-draining, addictive social game experiences to consumers worldwide," said DeNA CEO Tomoko Namba.
"Today's investment is another step in our process of becoming a mainstream American gaming brand through proprietary content and empowering others to prosper on our gaming platform. Despite the number of current deals we've announced in the US, we're just getting started."