Like two people, two controllers, one console on splitscreen?
grand-theft-auto-v,xbox-one – Can Two People Play Grand Theft Auto V at the Same Time on Xbox One?
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Related Solutions
I went back to the Mount Chiliad gondola and a mountain bike had spawned.
Since I hadn't done any more missions (so hadn't progressed any further in the game) this suggests the spawn is either random or time dependent (certain times of the day?)
No need for calculations!
According to the Grand Theft Auto Wiki, Los Santos has a population of over 4 million.
Best Answer
No. You can't. GTA V is a one-player game, but if you both own the game you could play GTA Online together.