Proceed to the far end of the room and follow the ramps down to the bottom...
...to find 2 sets of Uzi clips and a large medi pack (58-60). As you collect these items, you may hear eggs hatching above, but these are just the empty incubators in the room you came from, assuming you didn't trigger them earlier.
The next room, with the square fleshy blocks, lava pits, and incubators, is the final room in the level. You don't have to kill all the mutants, but if you want to, I do have a few tips. Every other egg is empty, so there are 4 mutants (38-41) in all. The first and third incubators on the right...
...and the second and fourth incubators on the left, actually contain mutants.
If you still have plenty of Uzi ammo, just approach each egg to hatch it...
...and kill what emerges.
- OR -
If you're using pistols and/or just want a safer strategy, try this: Climb onto the first fleshy block and walk to the northwest corner (i.e., the far right when facing the gold door).
Angle Lara so she's facing the walkway between the first and second incubators on the right side of the room. Hop back once.
Take a standing jump forward to land on the walkway, hatching the two eggs. The first releases a mutant (38). The other is empty. Immediately backflip onto the block.
Draw weapons and shoot the mutant from this safe spot.
When it explodes, turn around, walk to the corner of the block nearest the second incubator on the other side of the room. Repeat the process: angle Lara toward the walkway next to the incubator, hop back...
...jump forward to hatch the egg, then quickly backflip onto the block...
...and shoot the mutant from safety.
Take a running jump to the second fleshy block, then another to the third.
Repeat the same sequence for the remaining incubators, hatching one live egg and one "blank" then back flipping onto the the block for a safe vantage point.
NOTE: If you've killed all enemies in Atlantis (41 in this level, 31 in the Atlantean Stronghold), the "Not Too Late" achievement/trophy will unlock when you finish the level, not upon killing the last mutant.
When you're ready to finish the level, use the switch near the entrance. This opens the gold door at the far end of the room. It's timed to close in about 13 seconds. To make it through, throw the switch, tap Look to regain Lara's perspective...
...hop back twice, and turn left.
Then run along past the fleshy blocks, using running jumps to cover more distance. (If you skipped hatching the eggs, the ones on the left will shatter now. Just keep going.)
As you approach the far end of the room, take a final running jump angled slightly to the right, over the corner of the lava pit and toward the doorway, and continue running through.
Lara lands on a slope, which dumps her in a pool as empty eggs hatch above. Swim through the tunnel on the right to end the level. And that's all she wrote...until you return to Egypt in the next level.
NOTE: The achievements/trophies "Not Too Late" (for killing all enemies in Atlantis) and "Business Is Finished" (for completing the two Atlantis levels) should display now, along with the level statistics.
DARK MODE: Even with brightness adjusted, dark images on a light background can be hard to see. May I suggest a reputable dark mode browser extension, such as Dark Reader? (Download only from trusted sites, like darkreader.org or your browser's web store.)
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