Looking for Sci-fi film (erotic scene, alien life form, space?)

[Jackson]

Greetings to all.

As topic stated i am looking for a film i saw mid-nineties from VHS,  movie is of course older, least from 80´s.

My memories regarding film are not so good,  i am not even sure whether they were in space ship which landed at some point or whether they were living in some kind of base on some planet (expedition etc ).

However here are the things i do remember.

-There was a scene were man and a woman were making love/having sex, you could see their naked bodies very clearly/body movement, so it was soft core  at least, so probably not a mainstream movie.
- At some point there was a woman sitting in a front of a , what i think was,  computer control panel, front of that panel there was plexiglass wall i think, and behind that glass wall was somekind of computer or other electronical unit.
-Alien life form was 'merging' or sleeping in same space with  assumed computer.

-Then alien life form, using tentacle some sort,  kills that woman by punching trough her, first it looks like alien is going to have sex with her or impregnate her, but it kills her. (tentacle goes trough..*there*.. u know )

Also, one man tries to enter same space where the alien life form is,  alien sprays some kind of acid on top of that man.

At some point alien life form is climbing/escaping up to a rocky hill and one of the crew members fires gun towards it, killing it , if i remember correctly.

Hopefully some one remembers this one.

Best regards
Jack

[LilCerberus]

Forbidden World (1982) AKA Mutant
http://www.imdb.com/title/tt0083959/

[Jackson]

Resolved!

Thank you a lot =)