How do you unlock all activities in gta v story mode?

GTA V's story mode activities become available as you advance through the main storyline rather than through a single unlock mechanism. Each protagonist has unique activities: Franklin gains access to street races and robberies, Michael has assassination missions and property investments, while Trevor's activities include violent encounters and drug-related content. Strangers & Freaks missions, which are crucial for 100% completion, unlock sequentially after meeting their characters during story progression. Random Events appear throughout Los Santos and Blaine County as you explore, with different event types becoming available at various points in the campaign. The game's design ties activity availability to story milestones, so continuing main missions naturally unlocks additional content without requiring cheats or special items.