When The Forms Exhaust Their Variety (hereafter abbreviated "WTF") is a game set to minimalist composer Philip Glass' 1973 recording of Music With Changing Parts, a single track which clocks in at 1:01:40 and is available for $9.90 from iTunes. Play begins 1:40 after the music begins and ends at the exact moment when the the music is finished, lasting 1 hour.
A campaign is exactly ten sessions long, one for each of the ten , an ancient Chinese symbology that dates back to the 10 suns of Shang times.
Further details shall be forthcoming.