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.