Aberration is a Singleplayer Action/Horror mod for Half-Life 2. You play as a Resistance member who finds himself in a mysterious place with no idea how he got there. Play the mod to find out more.
In Aberration Part Two, there have been some small code tweaks to the mod to give it a more immersive feel.
First thing, is a vignette effect. Vignette is the blackend/dark corners of the screen that simulate the vision of actual eyes.
Secondly, a small but noticeable view bob was added to again, add more immersion.
Sorry for moddb quality, for 720 go here - Youtube.com