NAMCO x CAPCOM
The character KOS-MOS was included as part of the playable cast of "Namco × Capcom" for the PlayStation 2, a crossover title developed by Monolith Soft featuring characters from both Namco and Capcom-owned game franchises. KOS-MOS and her rival from "Xenosaga Episode III" T-elos appeared in '. Supporting character MOMO was later introduced alongside KOS-MOS and T-elos in the game's sequel '. Both KOS-MOS and T-elos starred in "Project X Zone" for the Nintendo 3DS, a spiritual successor to "Namco × Capcom" from the same development team. KOS-MOS also appeared in its sequel "Project X Zone 2" alongside "Xenoblade Chronicles" heroine Fiora. KOS-MOS and T-elos made cameo appearances as titular blades in "Xenoblade Chronicles 2".