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Use the Control Panels to materialize platforms. Be quick to move across them, because they disappear in less than 10 seconds. Each station with a control panel works as a checkpoint. Should you fall, try to get back on solid ground and talk to a Lab Assistant to be teleported to the last station you reached. There are 6 of these checkpoints in total.
If you die in the lava, a dialog will appear and you'll be able to automatically revive and transport back to the entrance, however speak to the Lab Assistant on the right to get the option of going to your last successful platform. It may be wise to unequip your armor during the jumping parts to avoid repair costs. However, if you die in any other circumstance you will not be able to respawn and must return to a waypoint or otherwise be revived. For this reason, if it seems like you are going to die anyway, it is advantageous to attempt suicide in the lava.
A few of the platforms leading on from station five are turned sideways and thus are unusable. Jump on to the ledge to your left instead, and then rejoin the blue platforms at the ledge's far end. Also, as you progress you will come within range of the large reactor construct in the center of the lava pit, which will fire energy beams at you.
The last Control Panel is a bit hidden. When you see the four level 10 Security Golems, turn around and you'll see it. Using it activates both the golems and multiple laser traps. All four golems need to be killed to drop the forcefield behind them. Remember to equip your armor if you took it off earlier.
Completing the puzzle awards the Spekks's Laboratory explorer achievement and a Magnificent Chest.
- It's possible to have another player assist by reactivating the discs for you if you get stuck midway through the second or the fifth checkpoints. You can also jump down, get to a place where the ground is stone, and find a golem which will take you to a station.
- If you are killed via any means other than lava, you still have "credit" for having completed the puzzle as far as you got. So, revive at a waypoint, and then come back and talk to one of the robots.