Videodrome: 3
Altered States: Haven't seen
Eraserhead: 2

Videodrome: 3
Altered States: 4
Eraserhead: 3

Videodrome: 2.75
Altered States: 1
Eraserhead: 1

Altered States: 3

Videodrome: 2
Altered States: 2
Eraserhead: 2

Scare-O-Meter scores (out of 5)

Videodrome (based on 8 ratings) - 3.2
Altered States (based on 7 ratings) - 2.9
Eraserhead (based on 8 ratings) - 2.5

All 3 surreal horror films do rather well in the rankings, with Cronenberg's masterpiece topping the trio.

All are duly added to the opening post.

Fire in the Sky: 3

Communion: Haven't seen (or even heard of)

Xtro: Haven't seen (or even heard of)

Those other two do sound interesting though.

Fire in the Sky: 3
Communion: 3
Xtro: 5 (few movies have scared the crap out of me like this one!)

I'll have to pass on this one. Haven't seen any of those films.