10 Invisible Enemies That Made You Rage Quit

Although this franchise hasn't had a new entry since the commercial failure of its third mainline title in 2011, the FEAR series nevertheless made a lasting mark on the horror genre.

Merging exhilarating bullet-time combat with unnerving sci-fi horror and heart-stopping jump scares, there was rarely a dull moment in the ongoing quest to stop Alma, the series' main antagonist.

Alongside being terrorised by disturbing visions of Alma, the first game also puts players up against a variety of appropriately creepy enemies, with Replica Assassins being the most memorable.

Developers Monolith take their time when building up to this enemy's reveal. By only giving players small glimpses of them at first, they ensure that the suspense is wound tight before they eventually come face-to-face with one.

Like other assassin enemies, Replica Assassins are agile and can cloak themselves to become invisible. They also like to cling to walls or ceilings to get the drop on players before retreating to another hiding place.

Hearing the distinctive electronic hum that signals these enemy's presence is enough to put players' nerves on edge before they attack, startling players in effective scares.

FEAR is a scary game, and these assassins are a large part of why.