This pack replaces graphics, sound effects, and music for the original NES game, Metroid. It is a hack that builds upon many prior hacks and it uses Metroid mOTHER as a base. It should be used with the Mesen 2 emulator (available at: https://github.com/SourMesen/Mesen2).

A USA Metroid ROM must be used with the following SHA-1 checksum: ecf39ec5a33e6a6f832f03e8ffc61c5d53f4f90b

The pack includes, but it not limited to, features detailed below. Many of these features are carryover from prior hacks that have previously been developed for Metroid. Items denoted with an asterisk are brand new features that have been created exclusively for the Mesen pack.

• Increased resolution**
• Increased frame count for movement animations**
• Scrolling backgrounds and foregrounds**
• Updated sound effects and music**
• File resources for alternate sound and graphics**
• New title and ending screen**
• Automap**
• New secret area in Brinstar**
• Pause screen powerup status indicators**
• Animated environments
• Beam stacking
• Saving
• Full health on startup
• Enemies disappear during door transitions
• Improved bomb laying mechanic

Instructions detailing the installation process are included in a README file.

The README contains details the work performed by each author below that helped make the HD pack possible:
Aclectico, KYA, Sour, mkwong98, Omegachaino, dACE, snarfblam, Infinity's End, DemickXII, Psyklax, Maximum Potion, VariaZim, WIP, Exaelart, Riklaionel, elgwen, strugglepoo, Luminist, Jorge Fuentes, Patricio Herrera, kottpower, PikaXRichMixer, Rundas45, delta7890, P0ZN0, Spooniest, Norma2D, Kercy, Phill Gonzales, HaddianKey, Raidouzero, Chad, Hydorah, Miguel Blanco, JUD6MENT, VGmusic Revisited, Noble Demon, Cubear, and Physix. Note: While, TeamSCU did not have direct involvement in Metroid: HD, elements of the pause screen UI were taken and adjusted from Prime 2D.