Unreal (Video Game)/YMMV


 * Breather Level: Serpent Canyon, which comes right after the enemy-infested labyrinth that is Cellars at Dasa.
 * Demonic Spiders: The Marines in the expansion pack. Fast, smart and hit hard with their assault rifles, rocket launchers and grenade launchers. Fortunately, you only have to face nine of them in the entire campaign. There's a specific type of botmatch where the regular bots are replaced with marines for extra challenge.
 * Epileptic Trees: The fan theories about what exactly the Player Character did in order to be imprisoned for tend to zig-zag around this trope. While they can get quite outlandish at times, they also have a kernel of truth in them: they almost always include the character committing atrocities of some sort. This is justified, since the translators logs in Vortex Rikers show that the prisoners are quite vicious, and the ship also has an execution chamber for them. In other words, they probably weren't locked up for mere traffic infractions.
 * Goddamned Bats:
 * You'd have to really suck to be killed by the tiny, spider-like Pupae, but they sure are damn annoying ((primarily because their hitboxes are so narrow that it's really hard to kill them once they get close, which they invariably do).
 * Another example from the expansion pack: Pack Hunters, which border on Demonic Spiders. One of the fastest-moving enemies in the game, they can corner and kill an unprepared player very quickly.