After beating the game once and using mostly melee weapons to kill monsters, Heather Mason will unlock the Beam Saber. It can be found on a door (as the doorknob) in the 2F north corridor of Central Square Shopping Center. It works like other battery weapons, and after receiving a 10 Star Ranking, its length will double.
After receiving the Beam Saber, the Flamethrower will automatically be unlocked after beating the game a second time.
- The Beam Saber has a leopard-skin strap on the hilt.
- Though it may be seen as a reference to the Lightsaber seen in Star Wars, the Book of Lost Memories states that the real reference material was the Space Sheriff live-action TV show, due to the way that Heather readies the weapon.
- Keeping with the reference to Space Sheriff, finding the Beam Saber in the HD Collection unlocks the trophy/achievement "There's a New Sheriff in Town".
- In Japanese popular culture, "Beam Saber" is the collective family name of particle-based, sword-type weapons in the Mobile Suit Gundam franchise. They are not laser or energy-based like light sabers.