Hobbies And Interests
Weapons
Completing certain tasks will unlock hidden weapons. For instance, collecting all the Retribution Intel Pieces will grant access to the Longbow 1S-1K. Gathering all the Secrets of the Marquis Intel pieces will provide you with plasma grenades. Getting all the Cloven Lore Intel pieces earns the XR-004 Allure, an energy-based grenade launcher. Finally, collecting all 67 Intel pieces unlocks the HE .44 Magnum handgun.
Bonn's Waterfall
The Bonn's Waterfall area contains a hidden platform where you can load up on ammo for your grenade launcher. Defeat the two Titans on the first bridge and then go to the end of the ramp of the portal you used to get there. Turn and face the elevator. Now turn 90 degrees to your left to find a large metal pillar. Once you reach the pillar, turn right and run off the platform's edge. You'll land on another platform with the desired ammunition.
Skill Points
Earning all possible skill points in the four areas of Rotterdam unlocks concept art, audio files and bonus movies. To earn all the skill points in Area 1, you need to kill two hybrids from inside the attic with one grenade, kill 10 enemies using explosive barrels and score nine headshots with the Fareye FR-1 while guarding Cartwright. In Area 2, you must kill eight Boilers with headshots, destroy both Worker Drones and return to the elevator without taking damage. For Area 3, survive for two minutes without killing the final two Titans, kill three Titans using the LAARK weapon and complete the dockyard battle without collecting health capsules. Finally, in Area 4, Mallery can't take any damage from Leapers, you must kill three Slipskulls using a thrown grenade and you must avoid any damage from Dropship missiles.
Mission IV Tips
After passing the third checkpoint in Mission IV, you'll have to disable some enemy guns. If playing with a partner, let your teammate shoot the shields for the power sources while you concentrate on the actual power sources. As soon as you destroy two of the four power sources, drones will spill out and attack. If needed, you can find ammo supplies at the center of the platform. Attempting to destroy the third power source draws attacking Chimeran soldiers. Firing on the fourth power source brings Boilers to the fray. Use free aim to shoot them in the head as quickly as possible, destroy the final power source and advance to the next checkpoint.