Lost Grotto is the 2nd chapter in Sword of the Sea. This guide contains all collectible locations and everything you need for trophies/achievements.
Collectibles Overview:
- Sword of the Sea Collectible Guide
Lost Grotto Collectibles
Water Point #1 – In this area some water points involve picking up a bubble by running into it, and then placing it in a turtle mouth nearby. The first one is required to be done to progress.
Water Point #2 – In the next area turn left immediately to find the water point, which activates the wall ride required to progress.
Stele #7: Not All Wars Have Victors – In the next area before the water ball near the door, activate the lanterns on the right to drop the sand and reveal the stele.
Secret Shell #11 – Follow the path onto the rooftops above where the stele is located and jump into the window behind the sand waterfall to find the shell.
Stele #8: The Great Dolphin – Follow the path past the door and the stele is on the platform with the crystals and shark statues.
Water Point #3 – Grab the water ball from in front of the door and follow the path on the ground into the building to find the turtle mouth.
Water Point #4 – Grab the water ball again, then use the wall ride reachable after activating the lanterns near the first turtle head. Follow the path across the rooftops up to the turtle head on the right.
Rideable Animal: Archelon– After restoring the water by activating both points, a bunch of fish will appear in the area. A few of them are large turtle-like creatures named Archelon. Jump on one to receive the trophy/achievement Archelon Rider 
after you jump off.
Secret Shell #12 – Go through the door to progress and in the room where you see the figure jump from the ledge on the far side of the area, drop off the ledge into the hole in the ground. At the bottom you can find the secret shell in a large pipe.
Water Point #5 – On the main path, required to progress.
Stele #9: The Lost Grotto – Use the kelp to reach the rooftops of the area, then the stele is in the middle of the building in the middle of the rooftop area.
Secret Shell #13 – Behind the building where the stele is, there is an open walkway with the shell.
Water Point #6 – Activate the 4 switches in the area to open the large gold door (it’s recommended to do this first and fully restore the area before looking for more collectibles to make the area easier to get around in) then follow the wall rides on the left to find the water bubble. Take the bubble back avoiding the falling sand by jumping back and forth between the wall rides to get back to the turtle mouth.
Stele #10: The Champion – In the same room as the turtle mouth to its right.
Water Point #7 – Out the door opened by the turtle mouth on the platform, required to progress.
Water Point #8 – On top of the building after the prior water point. Awards Cleanse the Lost Grotto .
Secret Shell #14 – Go around the back of the giant shark statue where you can ride up the back to find the shell at the top.
Bullfrog – Behind the statue drop off onto the long thin roof section and follow it to the stone pillar in the distance. Jump up and go around the left to find the frog on a stack of rocks, awarding the trophy/achievement Bullfrog .
Trick Attack Area #2 – Back in the open area, follow the path to the right to the large open building to find the time attack area. Beat the high score of 10,000.
Secret Shell #15 – In the area with the tall buildings where you activated the switches, you can drop down to the lowest level where one building has a shell in an open room.
Secret Shell #16 – Ride the first chain to the top of the buildings in the center of the area. On this rooftop you can find the shell in a small tunnel on the rooftop.
Secret Shell #17 – From the same rooftop as above, go to the end of the water path to the single building at the end. Off the side of this building you can find the shell on a ledge.
Secret Shell #18 – Ride the second chain back to the first area, then from the rooftop near the chain climb up the cliff on the left to find the shell at the end of the path.
Secret Shell #19 – Follow the rooftop from the chain pillars back toward the start of the area. The shell is in an open section of the building right near the wall.
Secret Shell #20 – In the first area on the rooftops near the large wallride you can use kelp to reach a ledge going above the wallride. Follow the path into a cave to find the shell.
Secret Shell #21 – Follow the chain toward the end of the area, but instead of going into the building jump around the ledges on the right side of the building. At the end you can find a small cave with this shell, awarding Lost Grotto Shell Collector .
NEXT: Forbidden Valley
