Pibber's Revenge

Talk to Space Stalker again to start this quest. Go to the marked location and enter the Xeno Powerplant hideout.

Once inside, explore the immediate area to find a chest with succeeding traps that you must trigger first before you can access it. The main path leads to a teleporter leading to the next area and another path leading to a lever. Step on the red panel to the NE and defeat the enemy to lower the spike. Fight your way through the enemies and you'll find the lever in the end. Now backtrack and head to the next area.

In the next area, you'll find a room with a lever and a flying chest. The lever will unlock another door in this area so after pulling it down and looting the flying chest, continue forth through the newly unlocked door and to the next area.

Head to the next large room to fight the Tyranozor again. Like before, you have to lure it to the grates on the floor before stepping on the panels and trigger the trap. This is the only way to deal effective damage against the boss. You can't use the same floor panel so you have to run to another corner of the room and lure the boss there again. The ideal distance to lure him is by standing at on the second tile away from the fire trap. This will put the boss in the middle of the grate and make it suffer more damage when the trap is triggered.

After defeating the boss, talk to Space Stalker outside to complete the quest.