6. You Can Become A Scientologist (Pretty Much)
The Epsilon Program first reared its head in GTA: San Andreas, and is very clearly a parody of the Church of Scientology, positioning itself as a scam cult that worships the ridiculous God Kifflom. They were referenced heavily in GTA IV, but in GTA V, it appears that they will tie far more into the actual gameplay. An achievement called "Kifflom!" is unlocked by " your path to enlightenment... or not", suggesting that you're actually able to directly interact with the cult, and even join them. More to the point, there is also an achievement called "Altruist Acolyte", which urges players to "deliver an unsuspecting victim to the Altruist Cult", and while it's unclear whether this refers to a different cult entirely, it's still pretty hilarious to think that you can kidnap someone and indoctrinate them.