Here is the full list of all 40 Rigid Force Alpha achievements.
Complete the first stage!
Complete the second stage!
Complete the third stage!
Complete the fourth stage!
Complete the fifth stage!
Complete the sixth stage!
Finish the introduction.
Play all six stages in Arcade Mode.
Complete the Boss Rush.
Destroy more than 1,000 enemies. For warming up!
Destroy more than 8,000 enemies. For advanced pilots only!
Destroy more than 25,000 enemies. A challenge for veterans!
Block more than 3,000 bullets using the Bullet Blade.
Collect at least 25,000 Energy Orbs throughout the game.
Pick up at least 600 items throughout the game.
Finish a complete stage without shooting at all.
Destroy the complete Armed Transport Fleet in Outpost Alpha.
Destroy the CORE-Plasmoid inside Vermis Station in under 17 seconds.
Defeat the giant Vurgosian Crawler.
Destroy all Screechbats in Creeo Base.
Destroy all Crashers in Aestus Facilities before they collide.
Don't let a single Mech escape frome The Hive!
Clear a complete stage and its boss without taking any damage.
Survive the boss rush without getting hit.
Finish the Boss Rush in less than 6 minutes.
Complete all stages in Arcade mode with an A rating.
Complete all stages in Arcade mode with a B rating or better.
Complete all stages in Arcade mode with a C rating or better.
Complete the entire Main Mission without taking any hit!
Save all of the missing comrades in any Arcade Mode Stage!
Destroy all Orb Bombs in any Arcade Mode Stage!
Don't let more than 3 enemies escape during a stage!
Defeat a boss enemy without ship upgrades.
Reach the highest multiplier in arcade mode.
Complete the Main Mission without using the energy bar at all.
Defeat a boss enemy while having a fully charged energy bar - without using it.
Achieve a score of 850,000 or more during the main mission.
Complete the entire main mission on "Hard"!
Stay in the front part of the screen for 10 seconds without damage during a stage.
Grab all the other 39 Achievements.