Default right-handed keys — change them or switch to left-handed in Settings → Key bindings.
WASD
Move
Ctrl
Crouch
Space
Jump
Left click
Fire / knife slash
Right click
Scope / knife stab
R
Reload
Tab
Scoreboard
Enter
Chat
Esc
Pause / settings
1–6 · X
Hotbar slots · harvest tool (X again to inspect it) — also back from building
Q · F · C · Shift
Build a wall · floor · stair · cone (no build mode — Z trap · V turret · R rotate stair)
G
Edit a build (doors, windows, holes, half ramps)
LMB / RMB · X knife
Place / upgrade · break your own pieces
E
Pick up · open · carry · revive · repair · heal Core
T · N
Throw · next throwable
H · 7-0
Adrenaline shot · use sack items 1-4
I · B · Y
Inventory · shop (Core ring) · ready — drag an item out or shift-click it at the Banker to drop/sell it
Hold jump to bunny hop — strafe (A/D) while turning to build speed. Every key can be rebound in Settings → Key bindings, which also has right- and left-handed presets.
PAUSED
Esc resumes in fullscreen · hold Esc to leave fullscreen