after years of rumored or cancelled handheld "halo" projects, "spartan assault" was the franchise's first mobile game. the developers spent time adapting "halo"s distinctive elements to a touchscreen game meant to be played in short bursts. the game received mixed reviews on release, with the game praised for its success at pinpointing "halo"s aesthetic; the mobile versions of the game received lower average scores. "spartan assault" was followed by a sequel, "", in 2015.