Obscure mechanics

## Mushroom spawns

You can stumble upon Fly amanitas on some maps. They can be used to trade with Kholod at the Swamps. You can also eat one.

About 80 mushrooms appear under trees each day at 10:00PM, randomly spread over 300+ fixed spawns in 11 maps. If you didn't pick up all 80, old ones disappear and the new crop respawns, distributed randomly.

Each spawn is always under a tree, however mushrooms can roll down a slope in certain maps. The following maps have the most mushroom spawns:

* Swamps
* Cordon
* Forgotten Forest
* Agroprom
* Dark Valley
* Undiscovered Land

## Burers dropping artifacts

Each 50th burer you kill is hard scripted to drop a random artifact. The artifact pool is the same as the list of the artifacts to be decayed at your first visit to X-18. In particular, save-scumming burer drops is the only way to obtain Emerald-group artifacts outside of quests.

## Bezoars

All creatures that generate the psi aura around them (except for the biomasses) have a 5% chance to drop a Bezoar. In particular, this item is useful to cook the Plasma Caterpillar artifact, which sells for good money and can recharge one exosuit battery with the Portable battery charger.

Robust controllers have the additional **50%** chance to drop a Bezoar. They spawn in quests, and also have the chance to spawn normally in the following locations:

* Army Warehouses - 1 controller, 25% chance of being Robust.
* Darkscape - 3 controllers with the 9% chance of each being Robust.
* Forgotten Forest - 2 controllers with 11% chance each. Only spawn after completing the Controller hunt storyline.
* Central Pripyat - 4 controllers, 25% for each. Only spawn after visiting the stadium and watching the cutscene.
* CNPP-1 - 1 controller, 20% chance.
* Zaton - 6 controllers, 10% chance for each.
* Jupiter - 8 controllers, 10% chance for each.
* Pripyat-1 Underpass - 1 controller, 30% chance.

Even if the controller is not Robust in any of the locations above, it still makes sense to kill it while passing by, because this will make it respawn in a few hours with a new chance for a Robust one.

Other than that, Bezoars can be obtained for several cyclic quests: Nimble, Dimak, Kolmogor, Miner, Sergey the Shaggy.

## Controller brains

**Controller's brains** only drop from the exceedingly rare type of controllers, with 100% chance. There's only a few non-unique sources of these brains:

* Bourbon's Zakhar's, Prime's, Sergey the Shaggy's cyclic quests.
* Up to 3 controllers respawn naturally in Darkscape, 11% chance for each to be the proper type.
* One Controller's brain can be obtained in Yuri Semetsky's random stash, although the chance to get this stash is minuscule and shouldn't be relied upon.

Other than that, only a limited amount of brains can be obtained in the following quests:

* Controller's brains quest - 2 controllers with the brains spawn in ATP, and 11 in CNPP-2. You have to give 2 of those to Lukash to finish the quest.
* Bringing A Farewell Note to Ghost will result in C-Consciousness room door in Monolith Control Bunker opening and 3 controllers with the brains spawning behind it.
* Chess Player, a very late game quest - one of Fritz's stashes.
* Chain quests for Dan, Bullet, Fima the Charcoal (×1 brain each), and Fistful (×3).

**Red Controller Brain** is a unique quest-only item. There are only a few quests in which you can obtain one *and* keep for yourself:

* Huckster's loot
* Invisible stashes: Army Warehouses
* Sexual maniac
* Klyonov's cyclic for the flasks you obtain during the Sniper questline. Note: these flasks are *very* limited, you will likely need those for other purposes!