Alone but strong

This is a single player first-person action shooter.

• Easy and uncomplicated to play. Not so much stealth and sniping but more of speed and action.
  
• 19 levels.
  
• A relatively open world allows the player to choose any path. Shoot all enemies or just run through the level.
  
• A mixture of realistic environment and unrealistic enemies.
  
• The humanoid enemies are zombies and biomechanical mutants.
  
• A large mech fires homing missiles.
  
• Another mech is armed with machine guns.
  
• The humanoid enemies chase the player.
  
• All enemies explode on close contact with the player.
  
• The biomechanical mutants shoot fireballs.
  
• Seems to work well with linux + proton.