steam_reset_all_stats_achievements();
Returns: N/A
With this function you can reset all the statistics and
achievements for you game to their default values (as defined in
the Steamworks control panel for your game). It is recommended that
you only use this function as a debug tool when developing your
game.
ini_open("Save.ini");
if global.Version != ini_read_real("Data", "Version", 0)
{
ini_write_real("Data", "Version",
global.Version);
steam_reset_all_stats_achievements();
}
ini_close();
The above code checks a stored value in an ini file against that of a global variable and if they are different, it resets the statistics and achievements for the game.