The Grand SM64 Kaizo Megapack 2025 (Summer Edition) presents a selection of the arguably best and most popular kaizo ROM hacks of Super Mario 64 ever released.

A kaizo ROM hack, or extreme ROM hack, is a game with an expert difficulty level, designed for advanced players.
They often far exceed the difficulty of what are called "casual hacks" that have regular levels of difficulty.
If you have beaten the hardest hacks of the Grand Rom Hack Megapack and look for higher challenges, this is the right place.

This megapack takes a chance to honor hack creators and outline their most remarkable creations.
These hacks are characterized by introducing at least 30 unique stars each, and, most importantly, by high quality in design and gameplay.

The folders contained in this megapack divide included hacks into three groups of increasingly higher difficulty.

The target audience of this megapack is advanced players. As such, it presupposes familiarity with ROM hacks and how to play them,
so this megapack will not include any instructions on how to set up and play any of these ROM hacks.
Any such instructions can be found in the original Grand Rom Hack Megapack.
Included hacks generally each feature their newest release version only, which are usually also always the most recommended versions to play on.

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If you got here but are looking for easier hacks to play, we highly recommend to download our regular megapack here:
https://sm64romhacks.com/megapack/

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This megapack was compiled and approved by the staff of sm64romhacks.com and its Discord server.
You can find more ROM hacks to download here and join our Discord server to join and meet our community!

https://sm64romhacks.com
https://discord.gg/BYrpMBG

You can also check out the website of our partners, who, like our own website, allow you to download hacks and engage with the world of ROM hacks in several more ways:

https://romhacking.com

We thank them for helping us in spreading our hobby with their attempts to make hacks more accessible, and we thank you for your interest by downloading this megapack!

This megapack was created on July 1st, 2025.
The next update will release on January 1st, 2026.
It will receive updates on a half-yearly basis.
If you have downloaded this pack after the respective date, you may want to look out for its newest edition.