ObsessionSoft is a small team of a few highly dedicated Mod makers.
Among the creations are Kreedz Climbing and Fragout!, both for HL2, whereas Kreedz Climbing the only of the 2 officially released.
There are no registered leaders of this group. This can be granted to the right person on request. Also why don't you join the community, we welcome creators and consumers alike and look forward to your comments.