The Fleeca Casino

 

Heists are not unique to GTA 5 and GTA Online. They have been present in most GTA games in the 3D and HD Universes. The bank robbery in Vice City, the intricate heist at Caligula's Casino, and the Three Leaf Clover mission in GTA 4 are great examples. 

These are part of what makes the GTA series so well-loved by fans.

GTA Online has eight heists in total. The first five were added by the Heists update and are fairly easy to complete. They don't take much time to finish, and the rewards aren't much high either. The later three heists came with their own titular updates.

These are much longer and far more difficult. However, the rewards are also much greater than the earlier heists. Grinding a few of these for a short period of time will generate ridiculous amounts of profit.