Princes of the Apocalypse
Dwarf (both subtypes)
Elf (high & forest)
Genasi (see notes on changes below)
Gnome (both subtypes from the phb & deep gnome)
Halfling (both subtypes)
Aarakocra are not allowed due to not being well-suited for the challenges in this campaign.
Air Genasi: add damage resistance: electricity, add cantrip Gust, Levitate is gained at 3rd level.
Earth Genasi: add damage resistance: acid, add Mold Earth cantrip, Pass Without Trace is gained at 3rd level.
Fire Genasi: no changes.
Water Genasi: change damage resistance to cold.