Acquire the Morphing Ball
Acquire the Long Beam
Acquire the Bombs
Acquire the Varia Suit
Acquire the Ice Beam
Acquire your first set of Missiles
Acquire your first energy tank
Acquire the Varia Suit before getting the Hi-Jump Boots
Acquire the Screw Attack before getting the Ice Beam
Acquire all available equipment and open all non-blue doors before entering Tourian (no passwords)
Acquire the Hi-Jump Boots
Acquire the Screw Attack
Acquire the Wave Beam
Gain access to Hideout I (no passwords)
Gain access to Norfair (no passwords)
Gain access to Hideout II (no passwords)
Gain access to Tourian (no passwords)
In Tourian, while having the Wave Beam, open all the non-blue doors and enter Mother Brain's room (don't reset after failed attempts - continue after dying)
Get to the platform for escaping Tourian with at least 777 time units remaining
Discover a new look for Samus
Discover how Samus can be invincible (Note: all other achievements will not work)
Escape from Tourian and complete the mission
Complete the mission in under 5 hr, 25 min, and 20 sec (first loop, no passwords)
Complete the mission in under 2 hr, 27 min, and 54 sec (first loop, no passwords)
Complete the mission in under 59 min and 9 sec (first loop, no passwords)
Complete the mission without dying (first loop, no passwords)
Complete the mission without the Varia Suit and Screw Attack, only 155 Missiles, and 2 Energy Tanks (no passwords)
Defeat Ridley
Defeat Ridley without taking damage (can leave & re-enter room if fail)
Find and defeat what appears to be Kraid
Defeat Kraid
Defeat Kraid without taking damage (can leave & re-enter room if fail)
Defeat Mother Brain
Defeat Mother Brain without taking damage (starts with first missile hit)