Drop in. Gather mats from trees & rocks, crack chests for shields, throw up walls to block bullets, edit them into doors & windows, and outlast 9 rivals as the storm closes in.
WASDArrows move · Mouse aim · Click / Space fire · B build · E gather · F edit
Editing: face one of your walls, hit F / EDIT, then click or tap the 3×3 tiles to carve doors and windows. Hit F / EDIT again to confirm.
Touch: left side = joystick, right side = aim & auto-fire, buttons for build/gather/edit.