Mortal Kombat: Onslaught's big selling point is its "mobile-exclusive" story - promising "high quality graphics, cinematic cutscenes, and bone-krushing kombat" - that'll see players joining forces with Raiden in a bid to prevent fallen Elder God Shinnok from gathering relics and regaining his evil powers. All that plays out through "massive real-time group battles", featuring up to ten fighters at once, that'll require players to tailor their team of four champions to take on progressively more difficult challenges.