Xtro 3: Watch the Skies (1995) is kind of a train wreck.
Like Xtro 2, which just ripped off Aliens in a pretty lousy way, the third film in this shouldn't-be-a-series really isn't doing it any favors. My brain is already expelling the memories like some strange contagion. I can't believe the same director did all three films but each one had different writers, which is clearly the problem. I enjoyed the first Xtro quite a bit, and it was rather unique, but this one is a mess. There are some very bad dodgy FX where the alien turns invisible, cloaking like the Predator but it looks horrible especially when it's a puppet being moved in the distance. I love puppets but wow. You shouldn't try to copy Predator especially if you can't pull it off. People will just make negative comparisons. It's much better to try to do something unique. Sadly, none of this film is scary and I didn't care for the characters at all, which are your typical cliche marines. I was bored trying to watch this. I felt no suspense or anything.