There are two: Metroid Prime and Metroid Prime 2: Echoes.
no there isn't any cheat codes,but there is unlockables
Yes samus is a girl. you can find that out by winning any of the following games: metroid, metroid 2, metroid prime, metroid prime 2, metroid prime 3, metroid zero mission and even more!
super Nintendo 64
super mario 64
No, you can't.
Super Smash Brothers, Super Mario 64, Street Fighter, Super Metroid. Those a few.
Nintindo Entertainment System -Metroid Gameboy -Metroid II: Return of Samus SuperNintindo -Super Metroid Gameboy Advanced -Metroid Fusion -Metroid Zero Mission Gamecube -Metroid Prime -Metroid Prime 2: Echoes DS -Metroid Prime Hunters -Metroid Prime Pinball Wii -(Gamecube Games) -Metroid Prime 3: Corruption -Metroid: The Other M
no you can play any of the games in any order
Yes, Metroid prime trilogy has 1 wii game: Metroid prime 3: corruption and 2 gamecube games: Metroid prime 2: echoes and metroid Prime 1 the two gamecube games have been adapted for Wii.
Currently 12, (not counting Metroid Prime: Trilogy and Zero Mission), and one unreleased, which is Metroid: Other M (making number 12). The chronological order of the games are: Metroid/Metroid: Zero Mission. (Zero Mission was a remake of the original Metroid) Metroid Prime/ Metroid Prime Pinball Metroid Prime: Hunters Metroid Prime 2: Echoes Metroid Prime 3: Corruption Metroid II: Return of Samus Super Metroid Metroid: Other M Metroid: Fusion *Note that these are NOT listed by release dates*
There might not be any more Prime games; who knows? But I have no doubt that the Metroid series will continue for a long, long time. It's probably going to be like Mario and Zelda, continuously new games.