Nightclubs in GTA Online are businesses included in the game as a part of the After Hours update. Any of the ten clubs can be purchased at the Maze Bank Foreclosures website.
To attain 100% completion of the game you need to do the following:
- complete all story missions;
- complete all payphone missions;
- complete all off-road races;
- complete all remote controlled vehicle missions;
- complete the Paramedic, Firefighter, Vigilante, and Taxi Driver missions;
- deliver all required vehicles for export: Emergency Vehicle Import/Export Crane in Portland, Industrial Import/Export Garage in Portland, Suburban Import/Export Garage on Shoreside Vale;
- collect 100 Hidden Packages;
- complete 20 Rampages;
- complete 20 Unique Jumps.
You can check your current progress in the pause menu in the “Stats” section.
GTA 3 is one of the few games in the series where is no reward for 100% completion of the game.