Frontier Highlands 2

From the Nuclear Power Plant Seal, pull the rivets to proceed.

Head left from the Nuclear Power Plant Seal, then downwards into the room with the flashback contraption.

Take the upper passage east. In the next room, remove the rivet with the harpoon ability and squeeze through to advance.

Before proceeding, consider getting upgrades. With the harpoon ability, you can reach two containment units.

CONTAINMENT UNIT 4 (Botanical Gardens): Start from the Nuclear Power Plant Seal, go left, then downwards to the flashback contraption room. Head west to the Leviathan Reef Bridge Seal.

Remove the rivet and proceed downwards. In the next room, deposit biomass if needed for the second form. Charge to push a rivet, then use harpoons to remove another. Pull the switch to unlock the passage below and go downwards.

You will reach a flooded area with the flashback contraption. Immediately go left to reach the Botanical Gardens Seal. Enter to proceed.

Inside the Botanical Gardens, go left, take the first path downwards, and keep going west until you reach the hive.

Swim towards the grated wall and use parasitism on the armored guard. Pull the switch to open the gate to the containment unit room.

Puzzle Explanation: To retrieve the biomass sample, you cannot act alone. Go back to the previous room, break the wooden parts, and use parasitism on the armored guard, then make him enter the containment unit room.

Go down the ladders and position the guard near the first gate. Seize control of the creature and enter the room. Pull the switch to open the gate and close the previous one.

Send the parasitism tentacle through the grated wall and make the armored guard climb the stairs. Pull the switch to open the locks.

Seize control, break the containment unit, retrieve the biomass sample, and acquire Pyrophilia (a defensive ability that protects the creature for a short time before it catches fire).

Head back to the seal you came from, go upwards, and take the tube leading upwards on the east side of the room.

Swim right to return to the flooded area, then go upwards to reach the Relith Science HQ Seal. Enter to search for another biomass sample.

CONTAINMENT UNIT 6 (Relith Science HQ): Enter the tube leading downwards and go east. Use harpoons to remove the rivet and enter the containment unit room.

Puzzle Explanation: Deposit biomass before entering to reach the first stage of evolution. Enter the room and remove the grid for the monster to retrieve energy. Enter the door and pull the switch to open the lock and activate the laser. Use invisibility to get past the laser without triggering it. Pull the switch to open the lock, then retrieve the biomass in the previous room.

Enter the containment unit room again and deposit the biomass on the red pool. Pull the switch, get past the laser while invisible, and push the switch so the deposited biomass falls to the other pool below.

Retrieve it, break the wooden beams, and destroy the containment unit to get Electrosis.

Proceed to the next area.