From BloodBlood II: The Chosen and is considered the BFG of the game. It projects a purple laser beam, and when that laser makes contact with a solid object, such as a wall or person, a purple vortex opens up, pulling objects in the vicinity into itself and causing massive damage. Like most BFGs, it uses large quantities of ammo and takes a long time to fire. Also, if a vortex is already open, the weapon cannot be fired again until that vortex closes. Enemies like the Behemoth or Death Shroud don't appear affected by its pull, but small enemies like Cultists or Shikari do.
Caleb first encounters the Singularity Generator when it is used on him in the Lafayette Museum of Antiquties by Gideon, the Mad Scientist, and the Prophet guardian. It appears to be an attempt to kill Caleb, but only succeeds in bringing Gabriella through. A subsequent attempt also brings Ishmael through. Caleb picks up the Singularity Generator for his own use in the CabalCo building, and is the last new weapon of the game.
The gun serves as a major plot device, as interdimensional technology is in part responsible for the invasion of Reality Beta and that is involved in the resurrection of the Chosen. Some unused sound files from Blood II: The Chosen REZ file mention a "Channeling Knife" that was severed in two and left somewhere called "Old Town". Gideon mentions that its power is to open up the doors to the realities, so it would probably have been related to the Singularity Generator.
AMMO TYPE: Batteries
REGULAR FIRE: Warms up and fires a large purple vortex which sucks in nearby enemies, causing massive damage
ALTERNATE FIRE: Same as regular