Atlantis - Cave with Transparent Bridge and Incubator

The next room contains a lava pit below a transparent bridge with a gap in the middle. Down in the gap is an incubator. Walk out toward the gap, turn right, walk to the edge, then take a standing jump to grab the crevice in the wall.

Let go and grab the edge of the doorway below. Pull up...

...and follow the tunnel to a switch. Use it to open the fleshy door on the far side of the bridge. Continue along the tunnel to the opening at the upper end.

Pick up 2 sets of Uzi clips (8-9), then run off the edge or take a standing jump down onto the bridge.

Take a running jump across the gap to grab the other side of the bridge. As you pass the incubator, the egg will hatch, releasing a winged mutant (8). Pull up and run into the doorway.

Get a lock on the mutant and back up into the passageway so it can't reach you. Then shoot it from there. Or, if you don't want all the kills, just keep going. (There's a save crystal in the passageway in NG+.)

[Atlantis Walkthrough]