In the words of ThorpyFX:

The WOPR is one of those pedals that started with an artist/friend wanting something to sound a bit different and elevate their sound beyond what we normally offer. Oli Brown (Oli Brown and the Dead Collective, formerly of Raveneye) has been a friend for a while so I thought I could help him out. He initially wanted a Fallout cloud coupled with the silicon Rangemaster-inspired circuit from the Veteran. This combo was absolutely massive sounding and Oli loved it and has used it for years now.