Stalker: Call of Pripyat → Quests → Night Hunt (for the Chimera)
Zveroboy offers us to kill the only remaining of two non-random chimeras. We don't refuse and accept the quest.
Travel to the south of the map and wait for nightfall (two or three hours after midnight will do). You can try setting up an ambush by climbing up the ladder to the top of the cistern. But that won't work; you need to go down and stand in the center of the area. The Chimera will gallop up from the east. Get a "Rebounder" or something similar ready, preferably a modified one, and preferably 50-60 rounds.
It's simply brutally durable. Also, make sure you have plenty of first aid kits and bandages, and drink an energy drink beforehand—you'll be running around in circles for a while. The main thing is to stay in sight of the enemy, and that's difficult, given the Chimera's incredible jumping ability.
Once you've completed the task, you'll receive money (as usual) and St. John's Wort's personal shotgun.
Source: gamer.ru
See also:
Meteorite landing. Event in Terraria