Symbiotic

Symbiotic is a fast-paced, first-person roguelike shooter where you, a recently escaped prisoner, have stolen a real monster of a weapon: The Symbiote. As you fight to escape the ever-changing labyrinth of an alien planet, the weapon will evolve in your hands, growing in exciting and terrifying ways. Use that power to triumph over the swarm's powerful leaders and escape!

• Wield a fully adaptable weapon that grows as you progress
• Ultimate replayability with procedurally placed level layouts
• Explore a strange alien world filled with dangerous enemies
• Highly challenging boss battles to test your combat skills

Source: Steam Store Description