The changes in this patch are aimed at reducing grinding in this game.
The player always starts the game with full energy.
Special item restores 10 energy instead of 5.
Special item restores 5 missiles instead of 2.
You can get 7 energy packs instead of 6.
Raising the missile pack restores the full missiles supply.
Time to get different endings changed 3|3-5|5-7|7-9|9 hours.
If the player collects all equipment (except Wave beam), at least 6 energy packs, all 21 missiles packs, killing all bosses (the maximum number of missiles is 255), then, regardless of the time of the game, he gets the best ending, where Samus in bikini only.
Original game requirements
Database match: Metroid (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: ECF39EC5A33E6A6F832F03E8FFC61C5D53F4F90B
File CRC32: A2C89CB9
ROM SHA-1: FDBFC7871962F72A1EF57E5A7E456164FB93430B
ROM CRC32: 70080810