Zone Hunter Weekend
Hunters of the Zone ask you to live in peace with your fellow stalker and to hunt only mutants.
From 14:00 MSK of 11.08 till 09:00 MSK of 14.08, Mushkar from the post in Tunguska will give "Hunter Day" quest to all comers. The reward will be Hunter Pins and experience. The quest takes place in two stages, with a break of 12 hours between the stages (plus one more break of 12 hours before the quest could be repeated), Mushkar doesn't like stalkers with karma below 250, but that's the only restrictions.
Find Mushkar for the details.