Neumann was interested to score music for the game once he finished his work on Redux: Dark Matters, after René Hellwig told him that his brother Timm was looking for a musician who could make a psytrance soundtrack.

Razion is a science fiction-themed horizontally scrolling shoot 'em up game in which the player take control of a space fighter craft through six increasingly difficult stages in order to defeat an assortment of enemy forces and bosses.

[1][2][3][4] The player has only two weapons at their disposal: the main gun that travels a max distance of the screen's height and a powerful beam capable of dealing high-damage to any enemy caught within its blast radius.

[3] The player can slowdown the ship's movement to avoid incoming bullets more precisely by pressing the A button in the Neo Geo version, which also produces a focused horizontal autofire shot.

[18][19] Prior to launch, Razion was compared by gaming outlets such as RetroManiac and Retro Gamer with both Pulstar, Blazing Star and DUX due to its pre-rendered graphical style and bright color palette.

[4][6][7][21] Reviewing Razion EX, TouchArcade's Shaun Musgrave regarded it as a "high-quality shoot-em-up" on Nintendo Switch in vein of Blazing Star, commending the balanced difficulty modes, scoring system, vintage-style visuals and soundtrack.