Below is a guide on the collectibles found in Chapter 14: Into the Fire of Marvel’s Guardians of the Galaxy. You can examine the Guardian Collectibles in the rooms of each team member after finding them to add the item to the Galactic Compendium.
Sacrosanct
Star-Lord – Team Lord
Work your way through the level until you reach the tunnel with the giant fan. The chest can be found on the upper right platform close to the fan.
Drax – Five Horsemen of the Apocalypse Outfit
Continue heading through the level until you reach the area where the team votes on whether Lady Hellbender should join the Guardians or not. As soon as you travel outside after this area, a massive explosion will go off. Keep heading forward until Groot makes a bridge. Take a right up the ramp and follow the path. You’ll need to melt the ice with the plasma ability on your gun along the way. Eventually, you’ll reach the elevated platform with the chest.
To Whom it May Concern / Gamora – Chosen Daughter Outfit
Continue working your way through the chapter until you reach the mines. You’ll come across a geyser of water to freeze in order to move forward. When you reach the area with the second geyser, there will be 3 more to your left to freeze. Go ahead and do so then jump across them to find a slit in the wall. Slip through it to find the collectibles!