* DemonicSpiders: The Siberian brothers, those GasmaskMooks wearing body armours. Not only can they take more damages than their regular counterparts, but they are usually equipped with the VIVDA KSK, a kind of automatic rifle firing explosive slugs which can OneHitKill Anderson even in Easy mode! Oh, and they are often met in corridors or closed areas, which make them even more lethal. Their dangerousity is actually a (tiny) bit reduced compared to what you expect: first, their gasmasks is only cosmetical and doesn't protect from mustard gas and LSD grenades; second, a VIVDA KSK magazine only holds five rounds so then must reload often.
* GeniusBonus : This game has plenty of interesting tidbits for the European history buff. The actual European front line of the war is the UsefulNotes/IronCurtain made literal, and there are multiple allusions to the [[UsefulNotes/RedOctober Russian Civil War]]. Even the town of Wolfenburg seems to be [[NoCommunitiesWereHarmed an alternate version of the German city]] of Wolfsburg, at least if the factory that [[LawyerFriendlyCameo looks suspiciously like the Volkswagen plant]] is anything to go by. Even some of the Russo-Mongol equipment obliquely references actual Soviet weaponry from the 1950s.
* GoddamnBats: Well-hidden snipers and rabid dogs with suicide bombs attached are particularly annoying.
* ParanoiaFuel : The use of sound effects is often very atmospheric, especially in the levels taking place in a dilapidated abandoned town. There's also one specific DoomDoors sound that makes the GhostTown scenery genuinely creepy.
* SpiritualLicensee : Probably the closest you'll ever get to a game adaptation of Orwell's ''[[Literature/NineteenEightyFour 1984]]'' -- general JustBeforeTheEnd / RuinsOfTheModernAge grimness, a ForeverWar between twentieth century superpowers fueled by fanatical propaganda, etc.