completionist
I can't really recommend this movie other than for the sake of nostalgia and completionism.
Unless you're going for completionism, there isn't really any need to replay all the alternate endings.
SMART Vocabulary: related words and phrases Enthusiasts
-aholic
-oholic
aficionado
anorak
armchair
audiophile
eager beaver
enthusiast
faddist
fan favourite
fanatic
nerd
numismatist
otaku
people watcher
turophile
ultra
watcher
Whovian
zealot
You can also find related words, phrases, and synonyms in the topics:
Competitors & participants in sports & games
Collecting and amassing