Update 2: The Windows Phone version is now also live in the Windows Phone Store.
Update: Halo: Spartan Strike is now out for Windows 8.1 in the Windows Store, but there's still no sign of the Windows Phone version.
Original story: After several months of waiting, Microsoft has finally released the top-down sci-fi shooter sequel Halo: Spartan Strike. The bad news is that the title, from developer Vanguard Games, is available first on iOS devices, ahead of its promised release for Windows Phone, Windows 8.1 and Steam platforms.
Microsoft first announced the game in October as an exclusive for those platforms for a release in December 2014. However, the company later announced a delay in the game's launch to "early 2015" because Microsoft and Halo's main developer 343 Industries needed to concentrate their efforts to fix the matchmaking issues in the Xbox One game Halo: The Master Chief Collection.
Microsoft last told us on March 31 that they "don't have any updates" on Halo: Spartan Strike. Clearly, something has changed since iOS users can now get the game, along with its predecessor Halo: Spartan Assault, which was released for Windows Phone, Windows 8.1 and Steam in 2013.
We have contacted Microsoft to try to get another update on the status of Halo: Spartan Strike for Windows platforms. In the meantime you can get the game from the iOS App Store right now for $5.99. That's also the same price for the iOS version of Halo: Spartan Assault or you can get both games in a bundle for $9.99.