The DLC Set 5 Add-on for R-Type Final 2 has 4 achievements.
Re-experience Tactics II: records of the battle between the allies and insurgents at the fortress.
Re-experience Delta: records of the Demonic Rhapsody battle at Fortress Aegis—the tragedy's genesis.
Cleared all fortress levels on R-TYPER or higher and drew the curtain on Re-experience Tactics II.
Used the TP-2 craft to draw a close to Re-experience Delta. It's more formidable than it looks.