Zerion-X9

Zerion-X9 is a 2.5D vertical bullet-hell shooter in which you pilot humanity’s last fighter on Operation Zerion-X9, a mission to reclaim Earth’s occupied territories from the Starfarers. The campaign has seven stages, with classic arcade-style controls, a locked overhead camera and 3D-rendered environments, enemies and effects.

Story

In April 206X, a colossal starship arrived on Earth. Its Starfarer visitors looked human apart from a horn on each forehead, spoke every human language and offered peace. Humanity welcomed them, and the two species signed the Peace Accord.

The Starfarers shared advanced technology, helping revolutionize energy systems, heal the environment, eliminate diseases once considered incurable and accelerate human civilization. As part of a new security alliance, they were entrusted with disputed territories that became the Shared Coexistence Zones. In 2090, Starfarer armies seized every zone without warning, turning the shared territories into occupied former human domains. You are the last fighter pilot assigned to reclaim them.

Seven battlefields

The main mode takes you through seven themed stages, including forest outposts on the front line, ruined colonies, submerged temple ruins and orbital fortresses extending into space. Enemy formations, bullet patterns and giant bosses vary between stages, and every stage ends with a boss fight. In Stages 6 and 7, powerful enemies attack in rapid succession, creating a near boss rush.

The campaign’s difficulty rises from Easy in Stage 1, to Normal in Stages 2–3, Hard in Stage 4, Very Hard in Stage 5, Super Hard in Stage 6 and Extra Hard in Stage 7.

Combat and power-ups

Collect items during battles to improve your fighter’s firepower and survivability. Enemies include fast-charging interceptors, heavy artillery units that unleash wide-ranging barrages and armored war machines.

• Shot upgrades: increase your fighter’s shot power.
• Homing missiles: add homing missile attacks.
• Shield recovery: restore your shield.
• Bombs: clear nearby enemies and bullets with a wide-area attack.