I must have missed when they ported Halo 5 to PC. And As far as Destiny goes, right now all we have are loose rumors. I wouldn't put much stock in those if I were you.
@Xdqwerty, Osu! Tatakae! Ouendan! is the Japanese version of the game, different settings/characters/songs but otherwise identical mechanics. I played that before I knew about Elite Beat Agents lol. Both fantastic games https://en.wikipedia.org/wiki/Osu!_Tatakae!_Ouendan