Braindead aka Dead Alive is a classic for gore. It also skews to the comedy side so it’s more enjoyable on rewatches.

More recently, The Sadness was pretty nasty but definitely more mean spirited. In that same vein, Headless is pretty nasty as well.

Gore is an interesting thing as it can be a single scene or an overall aesthetic i.e. the Evil Dead from 2013 has an insane amount of blood and violence but it’s not outright gore like Rikki Oh and definitely a more pure horror film.

That is a movie I haven’t watched in a long time. Braindead is really good, as are Bad Taste and Meet the Feebles.

I still remember the lawn mower scene.