Returns the uptime of the game/server in seconds (to at least 4 decimal places)
This is not synchronised or affected by the game.
This will be affected by precision loss if the uptime is more than 30+(?) days, and effectively cease to be functional after 50+(?) days.
You should use this function (or SysTime) for timing real-world events such as user interaction, but not for timing game events such as animations.