Here is the full list of all 49 STEEL STRIDER achievements.
Defeat the Stage 1-2 boss.
Defeat the Stage 1-4 giant robot boss.
Defeat the Stage 1-6 boss.
Defeat the Stage 1-8 boss.
Defeat the GMR Saladin and clear Stage 1.
Defeat the Stage 2-2 MCR.
Defeat the Stage 2-3 MCR.
Defeat the Stage 2-5 MCR.
Defeat the Stage 2-7 boss.
Defeat the Stage 2-9 Citadel Core.
Save the Trafalgar and defeat the giant ship that plows through escape pods.
Destroy the Stage 3-6 MCR.
Defeat the Stage 3 boss.
Shoot down the Stage 4-1 aerial MCR.
Defeat the Stage 4-4 MCR.
Defeat the second GMR Saladin at Stage 4-5.
Defeat the final boss and clear the game. Congratulations!
Clear the game on Easy.
Clear the game on Normal or above.
Destroy 100 enemies.
Destroy 500 enemies.
Destroy 1,000 enemies.
Deliver destruction to 5,000 enemies.
Destroy 100 enemies with your Plasma Blade.
Destroy 100 enemies with the Handgun.
Kill 50 enemies with the Level 3 Handgun.
Destroy 100 enemies with the Assault Rifle.
Destroy 100 enemies with the Shotgun.
Destroy 100 enemies with the Grenade Launcher.
Destroy 100 enemies with the Rocket Launcher.
Destroy 100 enemies with the Laser.
Destroy 100 enemies using the Railgun.
Destroy 100 enemies using the Guided Missile Launcher.
Raise all weapons to level 2.
Raise all weapons to level 3.
Clear a stealth section without being detected.
Forget about stealth, trigger every alarm!
Destroy the shield of a Saladin boss.
Clear a boss fight without taking damage.
Clear a section without taking damage.
Destroy 100 airborne enemies.
Defeat 25 airborne enemies using your Plasma Blade.
Destroy 50 crates.
Fall into a pit and Game Over. Better luck next time!
Clear a stage section using only the Plasma Blade.
Clear a stage section using only the Assault Rifle.
Clear a stage section using only the Handgun.
Step on a land mine and survive the experience.
Step on a land mine and Game Over.