Cardius

Cardius is a full 3D space shoot-'em-up inspired by classics like Gradius and Salamander. Instead of open space, you blast through a roller-coaster-like tunnel built from playing cards, facing waves of enemies and collecting powerful weapon upgrades for fast, arcade-style action.

The game offers deep customization: adjust enemy types and density, flying speed, tunnel length and tortuosity, and overall difficulty to tailor the experience from relaxed runs to intense bullet-hell sessions. Cardius blends nostalgic shooter mechanics with a fresh, card-themed visual twist for players seeking retro arcade thrills with modern control and customization.