ZeroRanger is a scrolling shooter developed by Finnish studio System Erasure and released for Microsoft Windows in September 2018.

[2] The most notable elements of ZeroRanger are its striking green and orange color scheme, and its decade-long development history.

ZeroRanger takes place on an Earth-like planet called Daikon, where aliens known as Green Orange have invaded with the intent of destroying all life.

These two remaining fighters must combat their planet's possessed defense force before they can reach and destroy the main Green Orange vessel.

[5] The first idea during development was to create a vertical scrolling shoot 'em up like Guxt by Studio Pixel.

Other influences cited by the developer include Cho Ren Sha 68K, Ikaruga, and Flame Zapper Kotsujin.

In Ikaruga, "every enemy pattern is distinct from one another"; feeling the impact of this, the ZeroRanger developers aimed to minimize repetition.

The developers did not want players to feel that they had to plan everything perfectly in order to maintain the game's combo-based score multiplier, or that there is only one correct weapon to use in each situation.

Justifying the effort, the developer cited GameMaker Studio's performance improvements and its introduction of shaders that allowed colors to be easily changed during post-processing, letting the developer make color palettes for the game without having to create new sprites for each palette.

[2][3][13] Dominic Tarason of Rock, Paper, Shotgun called ZeroRanger a "lovingly assembled mix-tape featuring the best bits across all of shmup history".

[10] ZeroRanger was praised for being relatively friendly to casual players, while still having the difficulty expected of arcade-style shoot 'em ups.

Jones observed that the game has a dynamic difficulty "rank" system, ensuring that players are treated to gameplay appropriate for their skill level.