SlowMoMod is a very simple mod that allows you to play GTA V at any speed you want. Easy activation by pressing the 'J' key and free regulation of the game speed with the '+' and '-' keys. The mod also has a small indicator that shows you the current game speed and whether the slowdown is active or not. This interface can be turned on or off by simply pressing "F5".
1. Install Script Hook V.
2. Install LUA Plugin for Script Hook V.
3. Extract the downloaded .zip archive to the Scripts folder located in the GTA V directory.
4. Run and have fun!