As stated in the prompt, this particular film was made up of a number of short stories with science fiction and/or horror elements. It's not one of the Creepshow films or the Tales From The Darkside movie. I do not recall exactly how many stories there were, but I do recall two of the stories fairly well.
The first story is about a rebellious teenager who is obsessed with a particular video game at the local arcade. He's the best player in town on the particular game, but he always seems to be defeated before cracking the final level. It sticks in my mind his family and friends are worried about his obsession.
The sci-fi elements come into play when the teen sneaks into the arcade late one night and finally cracks the secret level. To his horror, it turns out that the bad guy in the video game is released and the game becomes "real life". I recall the video game monster being a very blocky animation in the style of early 80s video games. I think it represented a face or the like.
The creature chases the teen, unleashing energy bolts, etc. The teen is eventually cornered, and we see the monster floating towards him in a first-person view. The twist comes the next morning, when worried friends and family come down to the arcade to look for him. The scene closes with his horrified friend looking at the game screen and realizing his friend is now a character trapped inside the game itself.
The second story involves a priest getting caught up in a car chase with what is probably The Devil. The priest has just left his parish, disenchanted and in a crisis of faith. He resists all attempts to change his mind, and the only thing he is willing to take with him is a vial of holy water that (IIRC) another priest insists he take with him for luck. The church is probably somewhere in the southwestern US, as I think the story takes place mostly in the desert
While on the road to wherever he's headed, the priest encounters a black truck or SUV-type vehicle. I don't recall exactly how it happens. What follows is a deadly game of chase very reminiscent of the Steven Spielberg tv movie Duel. We never see the antagonist, though we do get a glimpse from behind the wheel, which reveals an inverted cross hanging from the rear view mirror (thus the suspicion this is Old Nick we're dealing with here.)
The climax to the story comes when the priest, now on foot, is about to be run down by the SUV. The priest desperately throws the vial of holy water, which strikes the vehicle and causes it to vanish or explode (can't remember which). As best as I can remember, the story closes with the priest returning to the parish, his faith in God renewed.
Date of Release
I'm sure it's 1980s, probably early 80s, based on the video game story. The film is in English, and most likely a U.S.-made film.