If you wish to skip the grind for the 20+ costumes, you can manually edit your save files. Start a new game and save it to a slot (e.g., Slot 1). Exit the game completely.
In gallery mode, you can click different parts of the heroine's body to trigger various poses and dialogue. Guide :: How to unlock all costumes in 2 minutes Sword-x-Hime.rar
Costs are low (1 to 100), but each point requires a manual click. Reviewers from Save or Quit suggest using an auto-clicker to avoid tedious clicking when spending large amounts of cash. If you wish to skip the grind for
Defeat standard enemies (grunts) to find 10 different, progressively stronger weapons. Secrets & Shortcuts progressively stronger weapons. Secrets & Shortcuts