PlayStation 4 just refuses to give up, as yet another Call of Duty game is to be released on the platform, a leaker claims. Sony’s best-selling console, alongside Microsoft’s Xbox One, keeps chugging along somehow, especially since Activision seems reluctant to abandon the last generation. This is according to leaker Alaix , who has previously revealed a lot of Call of Duty’s unreleased content, such as Vanguard ‘s map pool and Black Ops ‘ skin collaborations. He said that this upcoming Call of Duty game, which he believes is going to be Modern Warfare 4 , is “currently being playtested on PS4,” meaning that Activision is at least trying to release the title on Sony’s last-gen console. Most modern CoD games came out on platforms across the board, including PlayStation 4 and Xbox One, and it wouldn’t be surprising to see Activision release another one over there, too.…