Full concept MODIFICATION of S.T.A.L.K.E.R. Call of Pripyat that touches every game aspect including textures, sfx, music, weapons, A.I., items, weather, mutants, difficulty and much more!
Monolith can commit suicide if defeated.
From Stalker lore/wiki:
"The Monolith stalker clan is a xenophobic religious cult, hostile to all but their own, that is a major part of S.T.A.L.K.E.R.: Shadow of Chernobyl and S.T.A.L.K.E.R.: Call of Pripyat and appears in a supporting role in S.T.A.L.K.E.R.: Clear Sky.
A religious cult that is hostile to all but their own, the Monolithians believe in the power of the Wish Granter, rumored to be an alien artifact hidden in the center of the Zone. Members of this faction devote their lives to protecting the secret of the Great Crystal, ensuring that no one ever reaches the center of the Zone.
A typical Monolithian is a former stalker brainwashed by one of the psychic emitters throughout the Zone into serving the will of the C-Consciousness, unflinchingly loyal and ready to sacrifice himself at a moment's notice. This extreme loyalty is achieved by creating intense religious fanatism in the mind of the stalker, directed towards the Monolith.
While physically, they are on par with other stalkers, their religious fervor sets them apart and allows them to ignore wounds and continue to fight, even after they run out of ammo. Stories abound of fanatical Monolith Stalkers, after running out of ammo, ditch their weapons and attempt to kill the enemy with their bare hands, no matter how grievous their wounds. This same fervor also prevents others from capturing a Monolith member – if taken into custody, he will commit suicide in any way possible (even by smashing his head against the wall)."
Thank you, jketiynu, for proposing this feature to MISERY.