The main film titled Octoberfest (2018) is a found-footage horror movie by Manny Velazquez about a punk teenager's Halloween prank that comes back to haunt him a year later, blending crime, drama, and supernatural horror; it's known for building tension and has a smaller following. If you're thinking of major releases, Halloween (2018) was a huge horror hit that year, but it's a different movie, as is the Indian drama October (2018).
Octoberfest (2018) - The Horror Film
Director/Writer/Producer: Manny Velazquez.
Genre: Horror, Crime, Drama.
Plot: A prank gone wrong on Halloween leads to supernatural consequences a year later.
Style: Found footage, focusing on building dread rather than jump scares, according to some fans.