If you're still sad that Rockstar hasn't released any story content for GTA 5, then the modding community has a gift. An enthusiast under the nickname alebal has released a set containing 70 new missions for single player mode.

Missions were created using the Mission Maker tool. Judging by the trailer, they all turned out to be quite diverse: the main characters either jump with a parachute, then ride strippers in a pink limousine, or do other crazy things for which we love GTA.