Headlines have assigned GTA 6 story lengths ranging from 35 hours to more than 100. The largest number is also the least useful: Rockstar has not announced a campaign runtime.
The 100-hour version appears to have grown from comments about spending a long time with the game, then transformed through reposting into a precise story length. No mission count, completed retail build or standardized playthrough was attached to the claim.
Why runtime rumors are difficult
Open-world games do not have one universal completion time. A player who follows only main missions will finish far sooner than someone exploring side activities, replaying missions, customizing vehicles and investigating every suspicious alligator.
Developer playthroughs are also poor consumer benchmarks. Developers test unfinished sections repeatedly, use debug tools and may spend hours evaluating systems that players experience only briefly.



