Halo: First Strike/Game Details

Health pack locations
Big Horn River — On the forest ground where the supplies left behind by the Spartans are present (Mission Start) Inside the structure where Admiral Whitcomb and his team are holding out (Rally Point Alpha)

Forest — Scattered around the crashed Pelican (Mission Start) Inside the generator complexes on every floor (Rally Point Alpha) none (Rally Point Bravo)

Circumference — Scattered around the crashed Pelican (Mission Start) Inside the space dock (Rally Point Alpha)

Threshold — Covenant medical terminals inside the flagship (Mission Start, Rally Point Alpha, Rally Point Bravo)

Ascendant Justice — Covenant medical terminals inside the flagship. The Engineer can also heal the player if he is injured (Mission Start, Rally Point Alpha)

Castle Base — Inside the ONI base (Rally Point Alpha)

The Crystal — None, although Dr Halsey can heal the player if he/she is injured (Mission Start, Rally Point Alpha)

Reach — Scattered supplies around the forest, sometimes accompanied by Marine corpses (Mission Start, Rally Point Alpha)

Gettysburg — Covenant medical terminals inside the flagship (Mission Start) Health kiosks inside the frigate (Rally Point Alpha)

Epsilon Secundus — Covenant medical terminals and health kiosks inside the respective ships (Mission Start) Health kiosks inside the frigate (Rally Point Alpha, Rally Point Bravo)

Unyielding Hierophant — Covenant medical terminals and health kiosks inside the station (Mission Start, Rally Point Alpha)