Gunvein is a dynamic, aggression-based bullet hell shoot em up where you use lock on lasers, charged weapons, bombs & hypers to overwhelm the enemies before they overwhelm you.
The gameplay loop revolves around using a variety of offensive tools - lock-on lasers, charged weapons, bombs, and hypers - to overwhelm enemy bullet patterns before they overwhelm the player. Players can choose from three distinct playable characters, each with their own unique ship type and playstyle.
Players can pilot the Bagon, a ship that uses overwhelming speed and power to dance through bullet patterns. It has a cone-shaped lock-on that allows the player to fire homing lasers. Alternatively, they can choose the Damul, which provides vast screen coverage and safety, allowing the player to hit enemies from anywhere on the screen. It has a full-screen lock-on and a huge laser beam. The third option is the Gunex, a highly experimental ship that requires planning and prediction to set up powerful bomb blasts. It uses charged bombs and a powered-up version of the Bagon's homing lasers. These distinct ship archetypes encourage experimentation and cater to different playstyles.
The scoring and progression systems are designed to encourage aggressive play. Quickly defeating enemies generates "bomb fragments" that can be collected to refill the player's limited supply of screen-clearing bombs. Using these bombs provides a significant score boost, creating a "destructive feedback loop" where aggressive play is rewarded with more resources to be aggressive. However, the player's bomb stock is capped at 3, forcing them to carefully balance bombing for score versus saving bombs for survival.
Beyond the basic shoot and bomb mechanics, the game features more advanced techniques that players can master to improve their performance. These include lock-on aiming, charged shots, micro/macro dodging, and restreaming - an advanced technique where the player carefully manipulates their shot trajectory to hit multiple enemies in quick succession. These layered mechanics create a high skill ceiling, rewarding players who take the time to learn and master the game's systems.
The game offers a range of difficulty options to accommodate players of all skill levels. Arcade Mode provides a challenging single-credit experience for shmup veterans, while Standard Mode is more forgiving, with balanced checkpoints and a shop system, suitable for newcomers. Roguelike Arrange Mode presents a procedurally generated take on the game's stages, offering endless replayability. The game also boasts an excellent tutorial that thoroughly explains core shmup concepts and techniques, making it an ideal entry point for genre newcomers.