Here is the full list of all 25 Biomech Hell achievements.
Complete the Laboratory Stage.
Complete the Cavern Stage.
Complete the Mountains Stage.
Complete the Warehouse Stage.
Complete the Factory Stage.
Complete the Warship Stage.
Collect 200000 points.
Destroy 20 robots.
Complete the Port Stage.
Don't give up, play again!
Complete the Abandoned City Stage.
Destroy 5 vehicles.
Complete the Nuclear Power Station Stage.
Kill 150 mutants.
Kill 10 enemies by head-shot.
Kill 100 enemies with the main weapon.
Complete the Forest Stage.
Kill 30 enemies with the flamethrower.
Kill 40 enemies by cutting them in two.
Kill 20 enemies by explosions.
Complete the Observatory Stage.
Complete the game with the best ending.
Complete the Boss Rush Mode.
Complete the Super Arcade Mode.
Unlock all artworks and visit the Art Gallery.