Cheats42.net

Press [F3] and you'll see a checkbox ticked in the top left saying: "Disable
Console". Press F8 to get a mouse cursor and uncheck the box to activate the
console. Once the console is enabled, press "Enter" then type in the command.
Whenever you restart the game, you need to press one of the overlay keys first
(e.g. F3) before pressing the console key.

Effect Code
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All blueprints unlocked - ALLBLUEPRINTS
Free useful items - MADLOOT
Invincibility - NODAMAGE
No crafting/building costs - NOCOST
No Radiation - RADIATION
Spawn Cyclops - SUB CYCLOPS
Spawn Seamoth - SPAWN SEAMOTH 1
Teleport to safety - WARPME
Unlimited Oxygen - OXYGEN
Faster building - FASTBUILD
Spawn item - ITEM (NAME OF ITEM) (AMOUNT)
Can go faster or slower - SPEED
Set the speed of the day speed
and the night speed - DAYNIGHTSPEED
Set to day - DAY
Set to night - NIGH
(NAME OF ITEM) (AMOUNT) - Spawn item
SPAWN SEAMOTH 1 - Spawn Seamoth
BIOME (Name) - Teleport to biomes
WARPME - Teleport to safety
OXYGEN - Unlimited Oxygen
EXOSUIT - SPAWN EXOSUIT


Achievements:
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Complete the following Tasks to earn the listed achievement. To view your
achievements and stats in Steam, select "Community", then search for the
game hub that corresponds to [Subnautica]. Select the "View Stats" drop
down option, then choose the option for your username's achievements.

Achievement How to unlock
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Aqualung - Craft an oxygen tank.

No Narcosis - Dive to a depth of 40m.