Clearly a rip off of Alien, Forbidden World is one of those obscured underrated gems that should be seen by fans of B movie flicks. This is a s sleazy as Roger Corman films go, bad acting, cheap sets and plot lifted from Ridley Scott's Alien and add to that a lot of blood and gore with nudity and you have a cult horror film you won't forget. Saying this about Forbidden World may seem like I'm stating its weakness. However, that's not the case. The film has a lot of charm that will surely appeal to fans of obscured horror cinema. Before watching this film, empty your mind and just enjoy some 80's schlock. For a low-budget quickie, I found Forbidden World to be lots of fun from start to finish. This is pure Roger Corman and it delivers everything you'd expect. The film is imperfect, and looks very cheap, but at the same that's what makes it good. This has plenty of good moments for horror fans to enjoy, and the strength of the film lies in its shocks, thrills and bloody content. Roger Corman knows how to deliver the goods on effective trashy horror gems, and Forbidden World is one of those films that really stands out. This is a film worth seeing if you love low-budget rip offs of big budget films and it's simply a fun film from start to finish. Don't take this film too seriously because it's pretty over the top. I very much enjoyed the film and it is gorier, grittier than the big budget films it tries to outdo. This is a flick that is sure to please Corman fans as well as low-budget horror fans looking for that film that delivers in ultimate cheapness; Forbidden Worlds is a very good viewing experience, one that horror fans should take.