1, "What I want to know is: Are all these names movies?"
My answer to this question is: corpse change series = evil death series = book of death series. People playing with ghosts is the third part of the evil spirit series.
As for why you have a vague concept. First of all, you should know that different regions have different translations of foreign films. The official title of this film is Evil Dead. In Hong Kong, the title is translated into "Corpse Change". In Taiwan Province Province, the title of the film was translated into Death of All Evil; On some domestic folk websites, the title of the film has been translated into the book of death. Therefore, the so-called "corpse change" series, the evil death series and the book of death series circulating on the Internet are actually the same movie series, but with different names.
PS: (1) The translation of corpse change is often used not only in this series, but also in several other separate films, but the content is completely different. (2) It should be translated into the book of death, because the demons in this series are actually awakened by the book of death. (3) In China, more websites and friends adopt the translation of evil death series.
2. "Which part did I see?"
My answer to this question is: did you watch the first movie or the second movie?
Because according to your description, "the hero heard a video, saw the book of death, and then the devil took the hero's girlfriend" should be the first part, but the key point is that you mentioned "four people came later" There were no more people in the first film, and only four new people were added in the second film: the professor, the professor's daughter, the repairman and the repairman's girlfriend. If it is the second part, it is likely that the introduction of the first part will be inserted at the beginning, so this understanding is reasonable. But I'm not sure yet. I can only say that it may be the first or the second, but the second is more likely.
3. "And I read the introduction of another website that all the protagonists are dead. What's wrong? "
My answer to this question is that the hero is not dead. Other basic deaths.
In the first film, at the end, the hero's friends are all dead, leaving only the hero.
In the second part, at the end, the professor, the professor's daughter, the repairman and the repairman's girlfriend all died, but only the protagonist survived, but was sucked into another space (1300 westworld).
In the third part, the hero led mankind to defeat the devil in the western world at 1300. Finally, the hero got a bottle of potion, and as long as every drop entered his eyes, he could push it forward for one year. As long as enough drops are dropped, MS is 12? (Too long, I forgot to ask for a few drops, probably assuming 12 drops), but the hero accidentally dropped a few more drops. Finally, when the hero wakes up, he has missed the world that once belonged to him and came to the future world, and that future world is just a ruin. At the end of the film, the hero growls at the ruins, and the film ends.
4. Kindly remind. Here I list the common translations of this film in China.
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The first part: the corpse of evil spirits, the book of death.
Part II: Ghost Player 2, Corpse 2 and Book of the Dead 2.
The third part: people play with ghosts, corpse change 3, book of death 3.