WOW Industries

 is an old factory Hazardous Ruin located in Bassanio Heights. Because Bassanio Heights is located on a sheer cliff with a broken lift and there is no other access route from the Portia Grassland side of the river, is not initially accessible. The exterior of can be approached after the player repairs the Lift Controls during  The Bassanio Lift, but the interior does not become unlocked until  The Poisoned Water.

Immediately inside is a large facility that can be entered at any time once the door is unlocked, though the dangerous sewage system within it can only be accessed during the following missions: The Poisoned Water,  The Burnt Warehouse, and Sam's romance mission,  The Lucky Charm. The sewage system can be entered at any hour as long as the player has one of those missions active. The immediate entrance of is a safe area where no monsters can spawn, but the sewage system is overrun by monsters that must be taken down in combat in order to proceed.

Note: is currently the only location that Backerats are found, so players seeking to take photos of them are recommended to complete  News Camera to get the Camera before completing The Burnt Warehouse, or else they will have to start dating Sam to get The Lucky Charm mission.

WOW Industries Hazardous Ruin
In The Poisoned Water, the player is forced into the ruin with Sam once they interact with the leaking pipe. The ruin is overrun with Bandirats, Redrats, and Backerats, and retracting spike traps litter the floor in certain areas. Certain areas are gated off, and the player will need to activate switches to open the gates in order to progress.

There are two lifts that ascend and descend to access parts of the sewer as well as an open pipe section that connects the map, requiring minor platforming. Near the end of the ruin is a section with moving platforms over a pit of sewage that must be navigated.

After a fight with the Rat King in the final room, the pollution flow can be shut off at a valve. Before defeating the Rat King, if the player gets knocked out once, then they have the option to exit. The player can exit and re-enter unlimited times.

Loot
There some side areas with treasure chests, as well as some wall sockets dotted throughout the ruin that each contain one Carbon Steel Bar. Before the final room are several chests, one of which contains Enhanced Iron Sword (Book).

There is a hidden room at the furthest green part of the map. One of the chests there contains a Power Stone and a Data Disc, while the other contains Game Cartridge - Protoform.

Tips and tricks

 * The player can refer to Tips and Tricks: Rat King for help during The Poisoned Water, if having difficulty defeating him.
 * During The Poisoned Water, once the player re-enters, instead of turning left to where the Rat King is, the player can go to the right and open the three treasure chests again for unlimited Nitre, Data Discs, Power Stones, and Enhanced Iron Sword recipes.

Bugs
Console Bug Alert: Leaving WOW Industries before completing  The Poisoned Water can result in the player getting locked out. However, it is possible that the player may be able to re-enter from an invisible access point located slightly to the left of the WOW Industries entrance, as shown here.