Super Mario 74: Extreme Edition

Super Mario 74 Extreme Edition (SM74EE for short) is a ROM hack made by Lugmillord. and released on Christmas 2012. It is the sequel of Super Mario 74, featuring 157 Stars, and the majority of the levels from the original hack are present. However, a lot of them have been altered, mirrored and redesigned to be extremely difficult, such as underwater sections and even solid ground being replaced by excessive lava falls or bottomless pits.

It was considered to be the hardest Super Mario 64 hack ever, until Star Revenge 2: Night of Doom came out in July 2013, just over half a year after this hack's release. It was then to be considered the second hardest SM64 hack in existence, just below Night of Doom, but since then most of the kaizo hacks have surpassed their difficulty level. Overall, Super Mario 74 Extreme Edition is widely acclaimed as the most popular difficult ROM hack in the SM64 ROM Hack community, and pioneered the extreme hack genre (later to be named kaizo).

There are also even harder joke "object edits" of this hack called "SM74EEEE", "SM74EEEEEE" (etc.), though they are not made by Lugmillord and only move objects around without changing any level geometry.