Treasure Hunter 1
Get all the treasure from Episode 1
There are a total of 79 treasures scattered across the 5 stages. You also receive 1 bonus treasure for successfully rescuing every survivor from a particular stage, for a sum of 84 total treasures.
Episode 1 is more of an introduction to the game, so most of the treasures are quite easy to spot. Remember to shoot all breakable objects and walls, as many treasures are hidden underneath. If you still need assistance in locating particular treasures, refer to the video walkthrough section at the top.
Treasure Hunter 2
Get all the treasure from Episode 2
There are a total of 75 treasures scattered across the 5 stages. You also receive 1 bonus treasure for successfully rescuing every survivor from a particular stage, for a sum of 80 total treasures.
Gathering every treasure from Episode 2 is actually harder than Episode 3's. You are introduced to fire, water, and ice elements here, and many of the treasures are buried in and beneath them. With fire, look for a black outline of the treasure. Ice requires you to either melt it or move it (using the Water Suit) to find any treasures. You'll sometimes have to melt/move an entire wall of ice just to find one piece of treasure. If you still need assistance in locating particular treasures, refer to the video walkthrough section at the top.
Treasure Hunter 3
Get all the treasure from Episode 3
There are a total of 66 treasures scattered across the 5 stages. You also receive 1 bonus treasure for successfully rescuing every survivor from a particular stage, for a sum of 71 total treasures.
Most of the treasures in this Episode are in plain sight. Others are buried in the oil/tar substance that you'll come across regularly throughout all the stages. If you still need assistance in locating particular treasures, refer to the video walkthrough section at the top.
A True Hero (Episode 1, 2, 3)
Safely rescue all normal survivors.
Each area in a stage has a set number of survivors that either need to be rescued, or killed, for the gate to open and let you progress. Because unlocking this trophy requires you to rescue everyone in the game, you'll want to be careful with your shots. Avoid shooting sporadically, and be careful when blasting through rock to reach survivors on the opposite side. Only shoot as much as is needed to break through. If you accidentally shoot a survivor, or have one killed by an enemy or element, pause the game and select "retry". Doing so will reload that particular area so you can try again. As long as you play smart and are aware of your surroundings, this trophy shouldn't give you much trouble.
Collect each and every special survivor to fill your gallery.
Each stage in an Episode houses one special survivor that requires rescuing. They differ in appearance from normal survivors, and will wave a flag when you are near them. Grab them with your cable the same way as the others. You'll know you've got a special survivor because a special screen will load afterward, giving you a brief description and background of the survivor. The stage select screen will also give you the person's name as an indication of rescuing them.
If you still need assistance in locating the special survivors, refer to the video walkthrough section at the top.
Note: The Special Survivor on The Furthest Depths stage in Episode 3 won't appear until after you've defeated the boss.
No Stone Unturned
Discover all secret areas in the game.
There are usually 1 or 2 secret areas in almost every stage. Look for large openings along the walls of an area and see if you can fly into them. If so, you'll hear a special tune indicating you've found a secret area. Some areas are hidden by breakable or combustible rocks/elements that you will need to clear first.
Sadly, there is no way of determining which stages secret areas have been found or not. If you didn't get the trophy after playing through the entire game, you'll just have to go back and replay the stages until the trophy pops.
If you still need assistance in locating any secret areas, refer to the video walkthrough section at the top.
Pick up 100 coins in one spin
The only way to pull in this many coins or more in one spin is by maxing out your multiplier. Your multiplier increases with each kill, but you only have a couple seconds in between before it resets, so you have to be fast and thorough. The trophy will unlock immediately after achieving the feat.
Below is a video I recorded detailing one
method in obtaining this trophy. There are several other areas too, but this is one of the first times you'll encounter a large group of enemies in one spot. The location is Episode 1 - Infestation.
You want your multiplier to be at 16x after you kill the first bat on the right-hand side. This results in a "Max Combo" chain for the 4 remaining bats.
Build a combo of 16 or over
Unlocking the Coin Collector trophy will also earn you this trophy, if you haven't already got it prior to.
Your combo meter increases with each enemy you kill. You only have a few seconds in between before the combo meter resets, however, and you can only reach 16x if there are at least 4-5 enemies in an area and you're fast in taking them out. Overall, this trophy is easily attainable and you'll probably unlock it without even realizing. If all else fails, refer to the video for Coin Collector.
Kill over 100 enemies
The amount here is cumulative, and you should unlock this trophy prior to finishing Episode 1. Your kill total keeps increasing any time you replay stages, so don't fret.
Cave Cleaner Pro
Kill over 500 enemies
Refer to Cave Cleaner trophy. You should unlock this trophy either by the end of Episode 2, or the start of Episode 3. Your kill total keeps increasing any time you replay stages, so don't fret.
Cave Cleaner Supreme
Kill over 1000 enemies
Expect to replay several stages to get this trophy. The same principles apply here as they did with the other two related trophies, so keep playing and you'll get it eventually.
Kill over 100 enemies using fluids rather than weapons
You can kill enemies by using their opposite elements against them. Fire and water can sometimes be dropped on enemies by blasting out rocks above them, but most of your fluid kills will come by using the two suits - the Magma Suit and Water Suit. There are a lot of areas in Episode 2 stages that utilize these suits, so if you didn't get the trophy after completing the game, replay some of these stages until it unlocks.
Don't Touch Me
Clear a stage without touching any walls.
This can be done on any stage, really, as long as you're careful and precise with your movements. For best, and easiest, results, choose "Into the Abyss" from Episode 1. Keep trying if you don't get it the first time, but all in all this trophy shouldn't give you any trouble. The trophy will unlock at the stats screen afterward.