Successor Of The Skies can be played in local co-op, although player two takes charge of a targeting reticule only. Given how chaotic the screen can get with just one character, that’s probably for the best, and it’s an entertaining inclusion, especially for unevenly skilled partners. For solo players, there’s also Isa And Kachi Mode, which only unlocks after you’ve completed the game with both characters individually. Now you can instantly switch characters at any point, allowing you to take advantage of their different fire modes to suit each situation, or bench one temporarily if their health is getting low. In other words, it adds a touch more tactical depth and makes the game easier – begging the question: why it wasn’t the default singleplayer experience?