Vudu has a listing of $5 movies about 'aliens' including the original Alien and also Predator, both in 4K (along with many other alien-centric movies)
Alien Day Sale
Alien (Theatrical - 1979 - 4k) - Vudu - Movies Anywhere - iTunes, Prime, Microsoft - $5
Predator (1987 - 4k) - Vudu - Movies Anywhere - iTunes, Prime, Microsoft - $5
There are also bundles available:
Alien Anthology - Vudu - $14.99
Alien Day Sale
Alien (Theatrical - 1979 - 4k) - Vudu - Movies Anywhere - iTunes, Prime, Microsoft - $5
Predator (1987 - 4k) - Vudu - Movies Anywhere - iTunes, Prime, Microsoft - $5
There are also bundles available:
Alien Anthology - Vudu - $14.99
- Alien
- Aliens
- Alien3
- Alien: Resurrection