Things the game never explains

Three guides to situations eventually faced by anyone who plays GTA V for more than a few evenings.

How to reach 100%

100% does not simply mean finishing the story. It requires a list of tasks, most of which many players never discover.

1
Complete all 69 story missions, including those that can be missed.
2
Complete 20 Strangers and Freaks tasks — this is also where the Bigfoot mission appears.
3
Complete 42 random events. They appear as blue dots on the map and disappear if you drive past.
4
Complete 14 hobbies and pastimes, including tennis, golf, yoga, hunting and races.
5
Complete 16 miscellaneous activities, including collecting scraps and completing jumps.

The reward is not only a trophy: UFOs also appear in the game. They cannot be seen before 100% completion.

Checked in game: completion statistics are under Pause → Stats → Completion.

This is the most common problem with a modded installation. It nearly always has the same cause and solution.

1
Do not use file verification until you know what changed, as it can remove all modifications.
2
Find the new game version and compare it with the version supported by your Script Hook.
3
If the hook does not support the new version, remove it temporarily. The game will then start without mods.
4
Wait for the authors to publish an updated version. Bypassing the version check usually creates more problems.
5
Only then restore the mods, one at a time, checking the game after every step.

Close any guide that asks you to disable antivirus protection or enter your Rockstar account details. A legitimate mod never needs either.

Whether you need Online mode or something has broken, restoring the game should take minutes.

1
If you backed up the entire game folder, restore it. This is why the backup is made before the first mod.
2
Without a backup, remove the added mod files and Script Hook.
3
Run file integrity verification through your game provider to replace damaged original files.
4
Before entering GTA Online, start Story Mode and check that the game runs cleanly.

Reaching 100% makes things appear in the world that were not there before. The secrets guide explains where and when to find them.