it doesn't update in real time, It only seems to update every 5-10 minutes or so
*edit* Just had an update and there is a massive boost to the numbers playing
So it seems when enough time has been spent playing one of the 13 games and the bar is filled up, the timer will reduce by an hour, two hours, five hours? Who knows...
apparently according to the IRC chat it is how long the games are played for and not how many people are playing at once,
Ha
Now it's showing current number of players in certain games, the more people playing, the quicker the countdown goes down.
Everyone fire up Defence Grid!
down to 93 hours from 98 already
Probably something to do with the total amount sold.