Sword slash
Lever Switch.
Large crash in distance (will be played when you press a switch and it has an effect in another room. should be a one syllable noise)
Gunshot (must be light, since users will be hearing it a lot)

walking into a wall, a subtle nudge sound to make it feel more physical when you bump something

rumbling explosion type sound for the intro rumbly parts

footsteps on different types of terrain (regular ground, metal, mud, etc.) should be a very subtle sound

menu bloops

Steam hissing.

Main character hurt.

Healing.

Footsteps.

Machinery running.

Lightning gun.

Whirligig.

Flying through the air?

Opening door.

Chest opening.

Item get! (da-da-da-daaaaaa~)

Money get.

Walking through water.

Sliding sound (e.g. zelda blocks)

Fire hazard.

Robot walking. 

Sword swipe.

Forest sounds. (e.g. crickets, birds, wind blowing on trees)

Menu sounds.

Sirens. (when airship was attacked in the intro)