Complete the game to unlock the radar locations of Ammo Caches, Journals, Tech Point Caches, and Weapons Lockers.
"Big Bang" trophy hint:
Inflict damage on a Watcher Knight until blue smoke appears from it, then hold [Grenade] until the grenade starts to sparkle yellow. It will now explode about three seconds after being thrown. Throw the grenade at the smoking Watcher Knight to destroy it.
"The Squishy Center" trophy hint:
Disable the Watcher Archon and use the melee finisher on its tail.
"Terminal Velocity" trophy hint:
Go to where Will first learns to fly in Episode 1. Note: To get more distance and a couple extra free fall seconds, use the hole to the prison that is the level's exit.
"Pack Rat" trophy hint:
This trophy is unlocked by collecting tech points. This refers to the lifetime total in your profile or gamertag, and not the current total of points (so feel free to upgrade your weapons).
Prologue - Beat Prologue.
Crash Site - Beat Crash Site.
The Village - Beat The Village.
Spare Parts - Beat Spare Parts.
Village Attack - Beat Village Attack.
Prophesized One - Beat Prophesized One.
The Survivors - Beat The Survivors.
Prison Escape - Beat Prison Escape.
Defending the Ark - Beat Defending the Ark.
The Collector - Beat The Collector.
The Revolt - Beat The Revolt.
Dear Diary - Dear Diary - Find a journal.
Tesla's Apprentice - Upgrade a weapon.
Grand Theft...UFO? - Hijacked 20 UFOs.
Blind Luck - Blind Luck - Kill one of each enemy footsoldier using blind fire.
Captain of the Ship - Destroy 10 enemy aircraft while yours is on fire.
Forgot My Two Cable - Fly though an Archon's legs.
Fireworks - Fireworks - Kill 10 enemies by exploding a piece of dynamite in the air.
Get Your Feet Wet - Buzz the water.
99 Red Balloons - Kill 10 enemies while they are in anti-gravity bubble.
Cliffhanger Killer - Kill 50 enemies while in vertical cover.
Death from Above - Kill 50 enemies while in hover.
Bird of Prey - Kill 25 ground enemies using your rocket pack guns.
Mark of the Adept - Kill 5 UFOs in the Prologue.
Rocket Clothesline - Perform a melee right after turning off rocket pack thrusters.
Terminal Velocity - Free fall for 10 seconds.
The Squishy Center - Kill a Sarpa piloting an Archon.
Cleanup on Aisle Three - Cleanup on Aisle Three - Kill 100 enemies with headshots.
Rochambeau, I Go First - Rochambeau, I Go First - Kill 50 enemies with melee attacks.
Blue Light Special - Blue Light Special - Kill 3 enemies with one grenade.
Killing Spree - Killing Spree - Kill 10 enemies within 60 seconds.
Those Aren't Fortune Cookies - Those Aren't Fortune Cookies - Step on 10 slugs.
Master of Arms - Master of Arms - Kill an enemy with every weapon.
I'm a Rocketman, Baby - Perform 100 special maneuvers while using the rocket pack.
Float Like a Butterfly - Kill 10 attackers immediately after escaping from their melee.
Into the Void - Beat Into the Void.
Breaking Camp - Beat Breaking Camp.
Tower of Return - Beat Tower of Return.
Bookworm - Bookworm - Found all journals.
Grease Monkey - Grease Monkey - Upgraded all weapons.
Pack Rat - Pack Rat - Acquired all 30,000 tech points.
Demolition Derby - Demolition Derby - Collide with another UFO 10 times.
The Big Bang - Destroy a Knight using a grenade.
Light up the Sky - Destroy 25 targets with the Ark's AA guns.
The Devastator - Destroy 25 UFOs while pilting a Survivor fighter.
Dark Void - Beat Dark Void.
Ultimate Bad Ass - Beat Dark Void on Hardcore.
Dark Void 100% Beat - Earn all Bronze, Silver, and Gold trophies.
Survivor Missions trophies:
Freedom Fighter - Survivor Missions - Complete a wave in any Survivor Mission.
Adept - Survivor Missions - Complete any Survivor Mission.
Hero - Survivor Missions - Complete the Battle of Ghen Crag mission with 980,000 points.
Ace - Survivor Missions - Complete the Abyss Canyon mission with 1 million points.
Blood Bath - Survivor Missions - Rack up a killing spree bonus of 33x.
Bulletproof - Survivor Missions - Complete a wave in a Survivor Mission without taking damage.
Speedster - Survivor Mission - Complete any Survivor Mission in under 35 minutes.
Spirit of Tesla - Survivor Missions - Upgrade a weapon to stage 3 in a Survivor Mission.
Epic Hero - Survivor Missions - Complete the Battle of Ghen Crag mission with 4.4 million points.
Top Ace - Survivor Missions - Complete the Abyss Canyon mission with 4.5 million points.