After Frank passes 5 days (10 straight hours real time) in Infinity mode, Frank can immediately go to the Security Room and take the Laser Sword.[1]
To retain the laser sword for other games:
Frank MUST die and save the game.
If you turn off the game instead of dying, the laser sword will be lost.
To keep the sword, you do not have to wait until day 7 to die and save the game.
Usage[]
Several guides consider the laser sword the strongest melee weapon in the game. It kills most psychopaths in one shot, and it kills the hardiest of psychopaths in two. For example, two hits will kill Larry Chiang the butcher and one hit will kill Otis Washington in infinity mode. It has 300 hits, like the Real Mega Buster, with excellent damage. It has exactly the same attack strength as the Real Mega Buster.[2][3][4]
This weapon has the exact same attack style as the katana but with extended range and rather than slicing zombies in half it merely dismembers limbs or heads.
Holding the “X” button will expand the sword for a few seconds.
Hold down and press , and the sword will expand into an extraordinary length (ten to fifteen feet), Frank will turn with the sword in circles, killing many of the zombies nearby. Be prepared to recollect the weapon afterward since Frank will hurl the sword as soon as he finishes spinning.
and press 
