Finish the game with a 74% or less completion percentage for the normal ending sequence. Finish the game with a 75% to 99% completion percentage to view an alternate ending sequence. Finish the game with a 100% completion percentage to view the best ending sequence.

Endings are based on percentage in this game, not on time, so relax and enjoy the scenery. The percentage itself actually refers to the items pickups in the game. Scanning and the Log Book aren't counted in that percentage.

Below 75% - Samus leaves the exploding Impact Crater, calls her ship in, and hops on top of it before the whole Artifact Chamber blows. She stares at the wrecked chamber for a moment, and the scene cuts as she's about to remove her
helmet. End credit roll. Samus' Gunship flies away from Tallon. Congratulatory screen showing Samus with a victory pose and percentage.

75%-99% - Samus leaves the exploding Impact Crater, calls her ship in, and hops on top of it before the whole Artifact Chamber blows. She removes her helmet and stares at the wrecked chamber for a moment, then departs. End credit roll. Samus' Gunship flies away from Tallon. Congratulatory screen showing Samus with a victory pose and percentage.

100% - Samus leaves the exploding Impact Crater, calls her ship in, and hops on top of it before the whole Artifact Chamber blows. She removes her helmet and stares at the wrecked chamber for a moment, then departs. End credit roll. Samus' Gunship flies away from Tallon. Congratulatory screen showing Samus without a helmet in victory pose and percentage. Cut to a scene of a undulating blob of Phazon. A black and red metal hand bursts from the Phazon. An alien eye looks around from the back of the hand.