Oxygen tanks and bio suits are required for all outdoor activities.

Biodomes and bases do not require oxygen tanks or bio suits.

Monuments have varied levels of difficulty and keycard requirements.

Gathering and hunting are done in the biosphere. Wood can also be found in misc piles

You can refill your oxygen tank at nearby refill stations or repair benches.

All items that require oxygen can only be placed inside your base.

There are 4 levels of bio suits which all have their own protection levels.

Supply drops are dropped via satellite, keep an eye on your map.