"Tide of Terror" is the first episode of Sly Cooper and the Thievius Raccoonus. It takes place in the Isle O'Wrath in the Welsh Triangle. The main antagonist is Sir Raleigh the frog, the chief machinist of the Fiendish Five.
As the Cooper Gang traveled to Wales, Sly took the opportunity to study up on Sir Raleigh, who once lived a life of luxury and privilege, but eventually grew tired of it. He then turned to piracy, which he found to be his calling. The Fiendish Five recruited him as their chief machinist. He built himself a storm machine that causes perpetual bad weather and ship wrecks, allowing him to plunder them for loot. His hideout was located off the coast of the Isle O'Wrath within the perilous Welsh Triangle.
|"A Stealthy Approach"|
|Sly and the gang arrive at the Welsh Triangle, the sinister resting place for hundreds of wrecked ships. Sly must avoid the guards and infiltrate Sir Raleigh's boat.|
|"Prowling the Grounds"|
|This is the main hub in this episode. Sly discovers that he needs two more of Sir Raleigh's treasure keys in order to infiltrate his storm machine and retrieve his page of the Thievius Raccoonus. Sly then moves on to the next set of areas.|
|"Into the Machine"|
|Sly enters the engine room of the boat. Bentley informs him that if he can follow the spinning crankshaft back to its original source, he will find Raleigh's treasure key. Sly ventures through the engine room, sabotaging it in the process.|
|"High Class Heist"|
|Sly enters Raleigh's treasury, where the frog stashes all the loot he has plundered from the ships his machine wrecked. Sly must avoid some of the best security systems on Raleigh's boat in order to retrieve another treasure key.|
|"The Fire Down Below"|
|Sly enters the power source room for the storm machine. The room is filled with furnaces and one main furnace. He must avoid the walrus guards and the fires in order to move on to the next level.|
|"A Cunning Disguise"|
|Sly enters Sir Raleigh's library, a place of knowledge within his boat. In order to get to the key, he must avoid the dart-shooting traps by using a barrel for protection.|
|"The Gunboat Graveyard"|
|Sly infiltrates Sir Raleigh's wrecked ship graveyard, where the villainous frog keeps some of the wrecked ships as collectible items. To reach the treasure key, Sly must face several guards and make his way across the water filled with debris.|
|"Treasure in the Depths"|
|Sly uses one of Raleigh's submarines to enter the secret, underwater room where his crabs have stashed his sunken treasure. Sly must prevent the crabs from taking the treasure chests in order to earn a treasure key.|
|"The Eye of the Storm"|
|After collecting all of the treasure keys, Sly faces the chief machinist of the Fiendish Five.|
After defeating Raleigh, Sly reclaimed his section of the Thievius Raccoonus, which provided detailed instructions on how to perform the Ninja Spire Jump, a technique Sly's ancestor Rioichi Cooper developed while sneaking into the thickly fortified castles of Feudal Japan. Due to the untimely arrival of Carmelita Fox, Sly had difficulty escaping Raleigh's ship. She failed to find Sly, and instead placed Raleigh and his crew under arrest. With the storm machine out of commission, boats returned to the ocean, and the mystery of the Welsh Triangle faded from memory.
The gang then took a vacation in England, enjoying the pleasant weather, and then returned home to begin their next heist.
- Walrus Guards
- Hammer Walrus, Welding Walrus, Shuriken Walrus, Belly Walrus
- Squid guard
- H.P Squidcraft
- This level was originally going to be completely underwater that featured a ship that could turn its "wings" to fit through crevasses.
- This is the only episode to have "Sly Cooper in:" in yellow on the title card, instead of blue.