Well, the Diablo III pic wasn't that hard, given that I've basically seen every screenshot and every tidbit of info regarding the game 
Though, there's still one game from the ones I've posted that has not been guessed at (the one with the japanese characters). I'd best give a hint: I was the one who added the western version of the game to the Game DB here on VGC and the main character is called Spike.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
