During Microsoft's Build conference today in San Francisco, the company officially announced a partnership with Unity Technologies--maker of the Unity game engine--related to the exciting-looking HoloLens technology. The Unity game engine is one of the biggest in the business, powering popular games like HearthStone: Heroes of Warcraft and Cities: Skylines, among many others.

As part of the deal, which Unity called an expansion of the two companies' "strategic collaboration," Microsoft and Unity are working together to offer an "optimal authoring solution" for HoloLens. This includes customized tools (anchoring holographic objects to specific places in the real world was one example) and other optimizations that Unity developers can use to create all manner of games and apps.

These new Unity tools for HoloLens will be available as part of the Unity Pro and Unity Personal packages for free, the company said.

"Expanding our relationship with Unity Technologies was a natural next step in bringing content to Microsoft HoloLens," Microsoft Xbox boss Yusuf Mehdi said in a statement. “We are very excited to unveil this partnership and look forward to the possibilities it will open for developers creating experiences for Microsoft HoloLens."

HoloLens was announced in January during a marquee Microsoft event. Outside of a Minecraft tech demo, though, Microsoft hasn't announced any games for HoloLens. However, this is an area the company is definitely looking at. No third-party games for HoloLens have been announced yet either.

For a closer look at HoloLens, check out GameSpot's image gallery.

Next month's The Witcher 3: Wild Hunt will be the final entry in the series where protagonist Geralt of Rivia plays the lead role. This much developer CD Projekt Red confirmed all the way back at the start of 2013. But now, senior writer Jakub Szamałek sheds more light on the decision in a new interview with IGN.

“I think good stories must have an ending," he said. "You cannot extend them indefinitely, and we felt that Geralt has had such an amazing adventure, and his saga is already so long and complex that this seemed like a good point to think about an appropriate finale for the story."

While Geralt "has reached the end of his journey," CD Projekt Red hasn't ruled out making more games in the series.

“The Witcher universe is a very big place with a lot of NPCs, a lot of characters, a lot of places we haven't shown yet," Szamałek explained. “So, we might return to it at some point…but we think that this is a good place to let Geralt enjoy his retirement and try something new."

Be sure to read the full IGN interview for more. And for more on The Witcher 3, check out GameSpot's extensive coverage of the game, including developer interviews, gameplay videos, and more.

Looking beyond The Witcher 3, which launches May 19 for consoles and PC, CD Projekt Red is also working on another RPG, Cyberpunk 2077. Little is known about this project, however.