Mission: Possible

Now that the protective field around the Chernobyl-1 mercenary base is down, it's time to mount the assault with the squads of both Hiko and Captain Savitsky, and finally take down Jackal.
==Walkthrough==
=== Outside the base ===
Follow Hiko's guys down to the base, where three more members of the squad will be waiting. As you walk down the road, be careful of three snipers on top of the buildings on the approach. Take these out as soon as you can so that they don't harass you on the way.
As Hiko gets closer to the base, he'll eat a scripted sniper shot and be out of commission for the rest of the fight so don't bother trying to heal him (you cannot).
As you get closer to the base, dialogue over the radio will imply that the mercenaries are about to release the hounds. True to their word, six Venom will spawn around the path into the base. Due to their resistance to most firearms the squad will be stuck on these for a while unless you help them out.
The Duty squad will already be fighting by the time Hiko's squad arrives, and will probably be nearly wiped out. Try to take out as much of the mercenary group as you can from the Lenin statue since there's good cover there. Make sure to kill the snipers at the top of the buildings across from you.
=== Inside the base ===
Beware the turret watching over the entrance to the base and advance when you feel confident no more mercenaries are advancing. Hiko's squad and any surviving Dutyers will spread out across the lower levels and flush out the remaining mercenaries, giving you a chance to climb either of the two tall buildings in the center of the base to snipe enemies as they appear and to remove any other turrets you can see.
After wandering far enough into the base, Jackal will spawn inside the mercenary quarters in the tower. He is dressed in a brown bandit combat suit. This will also cause mercenary reinforcements to start streaming in from the south, so be careful of your position. After he and his backup are all taken out you will be able to speak to Hiko (who walks into the base) for the Teleport to Chernobyl-1 and the Altruist achievement.
Hiko will thank you for your help and make an emergency evac to the nearest hospital by helicopter, finishing the questline.
==Notes==
* If you did not clear the church Savitsky warned you about, a large mercenary squad will spawn behind Hiko's base in the tunnel and wipe out the friendly stalkers there.
* A flamethrower, 6 gauge shotgun, or .700 Nitro Express gun will be very nice to have for the Venom section due to added pressure of mercenaries in the area. Otherwise you may have to smash your face into them with a crowbar and hope you don't get flinched out of the animation.
* Hiko's squad is not invincible, but they are very durable.
* Savitsky and his squad take the brunt of both the mercenary defense and the venom assault. It is possible but highly unlikely that he will survive.
* Hiko's emergency helicopter is invincible while flying in but can be shot down after it picks him up if you want to do a little trolling.
* Poplar, Ragged, and Beardy move into the base after the quest is complete. Beardy is a merchant with Skinflint's inventory duplicated, and Poplar repairs gear.
* After the last Hiko dialog, if you have finished the NS story (Rescuing Sparkle), Norman will move to Jupiter, with a final (flavor/inconsequential) dialogue. There's also a tiny bug related to it: Norman in disappears from Central Pripyat 2 seconds after appearing in Jupiter, so if you teleport at the right time, you'll interrupt the script and get two Normans.
==Bugs==