Could it be Nexus by Ramez Naam? Came out in 2012, the author's amazon page shows that this is his first novel (though he has written nonfiction before) and that he has worked as a computer scientist (though not a game designer). The plot description here involves both a new kind of "designer drug" that allows users to link minds (really some sort of computer implant, maybe nanotechnology), and apparently though it has the potential to "unite vast swaths of individuals into a rapturous gestalt of collective understanding and empathy" there's also the suggestion of oppressive governments that want to use it for nefarious mind-control purposes:
Set some thirty years into the future, the plot focuses on Kaden Lane,
a neuroscience PhD candidate at the University of California, San
Francisco. Kade, his lab mate Rangan Shankari, and their friends are
all practitioners of a designer drug called “Nexus 3”. However, Nexus
isn’t so much a drug as it is a lattice of data relays which take up
residence inside a person’s mind. The Nexus nodes allow users to
experience the thoughts, memories, and consciousness of other users.
Adept users, such as Kade and company, can even use Nexus to
manipulate the motor cortex of another Nexus user.
Were that not enough, Kade and Rangan have found a way to evolve Nexus
into something which takes up permanent residence in a person’s mind.
In combining this wetware with an open source operating system Kade
has turned himself into something new, a human capable of fully
networking his mind with other Nexus users. This potential frontier in
evolution, a technology which could unite vast swaths of individuals
into a rapturous gestalt of collective understanding and empathy, or
in the wrong hands be used for radical thought control, slavery, and
domination, attracts the attention of the Department of Homeland
Security’s Emerging Risks Division. In a world filled with Chinese
clone soldiers, potentially emergent AI, bio-neural hacks to augment
any mood or sensation, and human enhancement through nanotechnology,
Kade’s discovery of “Nexus 5” leads to his arrest. Therein he must
either work with the ERD to bring down another post-human or spend the
rest of his life in prison.
Another review here mentions "apocalyptic cults whose followers are infected with god-viruses that make them worship the leaders as messiahs", and that modifying Nexus to give anything more than weak "telepathy" is something that "turns out to be a completely prohibited activity in the USA, where enforcement of a convention against posthuman and transhuman enhancement has spawned a DHS-on-steroids (heh) that can render its arrestees to internment camps without trial."
Amazon shows the cover as silvery, but here's a photo I found of someone's copy where the cover is a shade that might be remembered as pink: