Another day, another gentle unwinding of GTA 5's code to reveal incoming features. You should take a look at this.
Venerable YouTuber Chr0m3xMoDz has provided some apparently solid proof that GTA 5 will be getting single-player zombie DLC in the future.
He's uncovered what appears to be a DLC selection screen in the GTA 5 code, with one of its three options pointing to "Dead". If you select it, the game checks for "SPZOMBIES". Which is kind of a giveaway.
The news comes after the first hints of a zombie pack emerged from the games code yesterday with the discovery of "ZMB" strings.
If true, the content would follow in the footsteps of Red Dead Redemptions Undead Nightmare pack. The add-on pitted protagonist John Marston against a Wild West zombie plague.
In addition, as you can see from this post on GTA Forums, Chr0m3xMoDz has uncovered code pointing to "Trevor" DLC. This appears to contain both CIA and assassination missions.