Brainpipe: A Plunge to Unhumanity

What is BRAINPIPE? Is it an otherworldly mind control device, masquerading as a seemingly quaint computer game? Is it a gateway to worlds beyond our own, created by eldritch wizardry and invoked by strange creatures hidden away on uncharted islands in the South Pacific? Perhaps it's a message from the future, an instruction to mankind to uplift humanity to a higher state of being.