Rhombus Square is a location in CrossWorlds. It is the capital of Shadoon; a large city of tall glass skyscrapers located on an island off the coast of the Croissant. The main city is only accessible to experienced players who have progressed along the Track of the Ancients to collect the four elements and complete the Trials of the Golden Bugs quest. Until then, it is only possible to visit the tutorial region, Newcomer's Bridge, and the teleportation hub, Cross Central.
Rhombus Square
Rhombus Square is the biggest city and capital of the human settlements on Shadoon. It is located in the sea near Rookie Harbor and constructed entirely out of glass and advanced metal alloys.
In order for a Seeker to gain access to the city, he must first collect all elements on the Track of the Ancients.
Newcomer's Bridge is a long stretch of buildings with an elevated walkway, located east of the main city. Individual stretches of the bridge are only connected by sections of the Rhombus Dungeon. CrossCentral is a large building containing a teleport hub, from which anywhere in the playground can be accessed. CrossCentral is connected to Newcomer's Bridge via sky rails, a virtual elevated transport system.
Newcomer's Bridge
The Newcomer's Bridge is located in the skyline of Rhombus Square and serves as the basic training for new Seekers. Located near the end of the bridge is the Rhombus Dungeon where the new recruits face their final test before taking the skyrails to Cross Central and leaving for the mainland.
-Encyclopedia entry
Cross Central
Cross Central is the primary teleportation HUB for the human civilization on Shadoon. It is located on a large tower in the middle of Rhombus Square and offers instant teleportation to all human settlements.
New Seekers who just completed the training on Newcomer's Bridge first enter Cross Central to teleport to Rookie Harbor and thus enter the main continent and start the Track of the Ancients.
Enter from the bottom of South Arch and walk all the way to the right and get to the 2nd floor. Wait for a truck to pass below and jump on top of it, jump on the platform to the north and make you way to the right. Use the High Jump Panel to reach this
One of the main draws of Rhombus Square is the Arena. Here, players can compete in scored matches against previously-fought enemies and win Arena Coins, which can be traded for powerful equipment and cosmetic items. Details on the Arena can be found on its own page.
As it is a city, enemies can only be encountered in Rhombus Square in special situations. Only enemies encountered outside of the Arena are shown here.
The Sprout of Ages rare destructible is in the South Arch. From the position where you can destroy the blocks to make the chest of the Very Large Ember accesible, jump north and walk into the southeast corner to reveal the Sprout
In addition to the standard equipment and consumable shops, Rhombus Square has a shop selling backer consumables, a shop selling the Chest Finder, and an arena shop that sells powerful equipment and cosmetics for arena coins.
Rhombus Items (Buy Land GF)
Rhombus Items (Arena Lobby)
Rhombus Items – Identical shops located in Buy Land GF and Arena Lobby.
CrossCentral provides a teleport hub with links to seven locations, as well as direct access to the main city. The teleport links can only be unlocked from the other side by entering the large landmark teleporters found in the Playground.
CrossCentral is also referred to in-game as CrossStation, although this may be specifically the sky rail terminal located on its roof.
Rhombus Square
Traders
Normal
Bronze
Silver
Gold
Quests
Key
Master Key
Silver
Emerald
Bronze
Golden Ticket
Gold
Very Large Ember
Normal
Rise Booster
Skirmisher
Lazy Claw, 2x 
Serene Bubble
Zealous Lamellar
Deadly Dancers
Hydra Fang
Gorgon Veil
Centaur Vest
Unicorn Greaves
Meister Gloves
Lifefiber Uniform
Gourmet Steak
Sandwich
Green Leaf Tea
Rising Super Star
Cobalt Goggles
Cobalt Edge
Cobalt Mail
Cobalt Boots
