100% Completion in GTA V

In order to achieve 100% completion in GTA V the player must:

1. Complete all 69 storyline missions

2. Complete all random encounters

3. Participate in all hobbies and pasttimes

4. Complete all rampages

5. Complete at least 25 stunt jumps (out of 50).

6. Complete a number of other tasks

Getting 100% completion unlocks the "Career Criminal" achievement/trophy. There may be other rewards, but they are currently unknown.