"Reach the reactor core" is an objective in The Saboteur in Battleborn
Walkthrough[edit]
Head on out of the Foundry. Time to make it over to the destination. Head to the North and go through the doorway there. Step onto the jump pad to be launched across the gap and toward your next destination.
Continue to the Northeast along the sides. You will find Evolved Thralls and others waiting for you. Go to the Northeast along the central path to reach the base of an extendable bridge. Some of the team will need to break off to activate the bridge and allow the whole team to continue forward.
Once that switch is activated, there is a second back at the top of the walkway to be activated. Simply trigger it to get the bridge in place.
Start across the bridge. There will be Thralls landing on the bridge that you will need to get through. Fight on through them all and press forward.
When you make it to the far side of the bridge there will be no only Thralls but Varelsi to deal with as well. They will come from the entrance of the Reactor core and the two side paths coming off it.
Go into the Reactor core to trigger the next part.