Perhaps the worst-kept secret in all of the video game industry right now is Valve's new game and IP Deadlock.
There's been quite a lot of drama about the game over the past week (including one outlet sharing its own 'hands on' experience) and although there's not even an official announcement yet (even though we've already had some leaks), it's already got more than 20,000 concurrent Steam players testing it out, putting it in the top 100 "most played games" on Steam right now (via SteamDB).
Even if you've played the game, according to various reports online and social media, you're not meant to discuss, record, stream or publicise your experience with anyone. As revealed in previous leaks, Deadlock is essentially a "6v6 4-lane third-person shooter MOBA" in its current state.
Obviously this game is still in development, but if it does see the light of day, there's always a chance it could come to a system like Xbox in the future. Although some Valve titles have skipped consoles in the past, many other series like Half-Life, Team Fortress, Portal and Left 4 Dead have been released across multiple platforms over the years.