List of Items
There are exactly 100 items in Zero Mission: 14 Major Suit Upgrades, 12 Energy Tanks, 50 Missiles, 15 Super Missiles, and 9 Power Bombs.
3 of the items are labeled as Unknown Items, they must be collected in order to progress through the game but they are locked by your regular power suit until you complete the Suitless section of the game. At that point your fully powered suit unlocked and you're able to use all 3 Unknown Items.
- Morph Ball
- Long Beam
- Charge Beam
- Bombs
- Power Grip
- Ice Beam
- Speedbooster
- Hi-Jump / Springball
- Varia Suit
- Wave Beam
- Screw Attack
- Plasma Beam (Unknown Item)
- Space Jump (Unknown Item)
- Gravity Suit (Unknown Item)
- Energy Tank Expansions x12
- Missile Expansions x50
- Super Missile Expansions x15
- Power Bomb Expansions x9
Varia Suit
The Varia Suit is not commonly seen in runs because for most categories it is too far out of the way to be useful, and for the 100% category you get this item automatically after completing the Suitless section and it still counts as a %, so there's no reason to go pick it up.
Low%
In a low% speedrun you will only need 9 items to complete the game: Morph, Bombs, Ice Beam, Power Grip, the 3 Unknown Items, 1 Missile Expansion, and the Varia Suit.
Hard Mode
In Hard Mode the game gives you half of the ammo/hp you would normally get from expansions, and this is rounded down so regular missile expansions give you 2 missiles, energy tanks increase you maximum energy by 50, and super and power bomb expansions only give you 1 of each.