Microsoft plans to show off a new exclusive intellectual property during E3 2015, according to tweets by Xbox head Phil Spencer.

“We should have new exclusive IP at E3,” Spencer tweeted. “I'm trying to make this E3 more about 1st party than past E3s.”

“This is going to be a fun year,” he added. “I think it might be our best 1st party content year ever.”

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Last October, Spencer revealed that Microsoft’s development studios is working on a new IP that isn’t a “another military space marine game” or racing title. Microsoft is expected to show off more Scalebound, the action-adventure game from developer Platinum Games and game director Hideki Kamiya, during E3 2015 this year.

Spencer last week confirmed the long-rumoured departure of Phil Harrison, corporate VP in Xbox in Europe. For a full list of all rumored and confirmed games coming to this year's E3, head over to the E3 2015 games wiki.

Jenna Pitcher is a freelance journalist writing for IGN. You can follow her on Twitter