Here is the full list of all 15 Raiden Legacy - there are Steam Edition achievements.
Play with all ships of Raiden Fighters Jet
Complete the Arcade Mode of Raiden Fighters Jet
Complete final level without dying!
Complete the Arcade Mode of Raiden Fighters 2
Score 10,000,000 pts in any Raiden Fighters game
Die more than 150 times (across all games)
Complete the Arcade Mode of Raiden Fighters
Use more than 500 bombs (across all games)
Complete the Arcade Mode of Raiden
Complete the final level without dying!
Complete Stage 1 (any game or difficulty)
Score 50,000,000 pts in any Raiden Fighters game
Score 100,000,000 pts in any Raiden Fighters game