Keys and Locks

General Locks

Unlocked

This is always accessible.

Doors Locks

These require having acquired the appropriate upgrade, and you must have ammo available.

Normal Door

These can be opened with any weapon. They also open automatically if the player is launching Horizontally or Vertically.

Elemental Door

Requires the matching Elemental Weapon to leave the room.

Missile Door

Requires a Missile to leave the room.

Big Missile Door

Requires a Big Missile to leave the room.

Big Bomb Door

Requires a Big Bomb to leave the room.

Gate Locks

Normal Gate

These can be opened with any weapon from the correct side (1-way). These can also be opened from the wrong side with the Quantum weapon.

Missile Gate

Requires a Missile to open the gate from the correct side. (1-way).

Big Missile Gate

Requires a Big Missile to open the gate from the correct side. (1-way).

Elemental Gate

Requires the matching Elemental Weapon to open the gate (1-way).

Blocks

Blaster Block

Shoot it with your gun to break. Always openable as long as you can hit them.

Elemental Block

Requires the matching Elemental Weapon to break.

Bomb Block

Drop a bomb or Big Bomb while in Cat Form to break.

Missile Block

Requires a Missile or Big Missile to break.

Big Missile Block

Requires a Big Missile to break.

Big Bomb Block

Drop a Big Bomb while in Cat Form to break.

Sprint Block

Run through these at high speed to break.

Launch Block

Hit these while launching horizontally to break.

Crumble Block

Stand on these from above to break.

Suit Locks

These require that you both have the suit and that it is enabled.

Hot Area

Requires the Heat Suit to greatly reduce damage take over time in these areas. If the Defense Suit is also equipped, no damage is done at all.

Cold Area

Requires the Cold Suit to greatly reduce damage take over time in these areas. If the Defense Suit is also equipped, no damage is done at all.

Water

Movement in water is dramatically slowed down and more difficult. Liquid Suit makes it like normal movement.

Mud

Movement in mud is near impossible. Liquid Suit makes it behave like Water.

Hot Water

Behaves like normal water with the Liquid Suit. It hurts you over time without the Heat Suit.

Cold Water

Behaves like normal water with the Liquid Suit. It hurts you over time without the Cold Suit.

Lava

Behaves like Mud with the Liquid Suit. Hurts you very quickly over time. Damage can be reduced with the Heat Suit and reduced more with the Defense Suit, but it will always hurt you.

Liquid Methane

Behaves like Mud with the Liquid Suit. Hurts you very quickly over time. Damage can be reduced with the Cold Suit and reduced more with the Defense Suit, but it will always hurt you.

Movement Locks

High Ledge

This is a ledge that requires High Jump to reach. (150% normal jump height.)

Double High Ledge

This is a ledge that requires Double Jump to reach. (200% normal jump height.)

Triple High Ledge

This is a ledge that requires both High Jump and Double Jump to reach. (300% normal jump height.)

Vertical Shaft

Requires Vert Launch upgrade to launch yourself vertically. This uses energy to continue the vertical launch, so you must have enough available to complete it.

Dash Gap

Requires the Dash upgrade. These are completed by jumping off one side and dashing to get to the other side.

Tunnel

Cat Form is small enough to fit through tunnels.

Tunnel Gap

Requires Cat Claws to cross since wall climbing also allows pulling up onto ledges.

Wall Climb

Requires Cat Claws upgrade to climb walls. Only works on walls that are climbable.

Wide Chasm

Requires the Horizontal Launch upgrade. These are completed by launching yourself horizontally as a cat.

Wall Chasm

Requires Cat Claws and launching yourself with the Horizontal Launch upgrade off of a wall.

Elemental Boss Locks

Killing a biome boss gets you the Orb of the opposite biome. They were guarding it to prevent it from being used against themselves.

Biome Boss Door

These are indestructible until the player has the correct Orb, then they become normal doors.

All Active Orbs Gate

These are indestructible and remain closed until the Orbs from the bosses of All Active Biomes have been acquired. Which biomes this requires depends on the world that was generated. Typically you'll find these blocking your path to the End Boss.

End Boss Door

The end boss door is indestructible until after the End Boss has been defeated, then it becomes a normal door.