Vetusia is classic Tibia 7.72 rebuilt from the leaked 2006 CipSoft server and its original world map. The map, the spells, the NPCs and the creatures are the original ones -- what changes from world to world is only how fast you progress.
Accounts and characters. You create one account on the site (Create Account) with an account number of 5 to 9 digits and a password, and every new account comes with one year of Premium. The same account gives you access to all three worlds. Characters are created on the site, where you pick the name, the sex and the world; the vocation is chosen later, inside the game, with the NPC in your starting city.
Three worlds, three paces. Valdera is 1x, Orvana is 2x and Nyxera is 10x experience and skill with 3x loot chance. Rates apply to experience from kills, magic level and weapon/shielding skills, and to the chance of an item dropping from a creature (never the stack size). Each world is fully independent: characters, items and gold never move between them. The Monsters page shows the experience and loot chances of every creature already adjusted to the world you pick.
The daily server save. Every day at 05:00 CET the world is restored from the original map: items left on the ground disappear and the original ones come back. Your inventory and depot are never touched. This is also the moment when house auctions are settled, rent is collected and evictions happen, and you may be disconnected for a few minutes while the world restarts.
Houses. Every empty house is open for auction, with a one-day auction and weekly rent paid from your depot. The details, including what happens if the gold is not there, are in the houses guide.
How to connect. Use the Vetusia Client (Windows, macOS, Linux and Android) or the original Tibia.exe with an IP changer -- everything is explained on the Downloads page. Rankings, who is online, kill statistics, guilds and polls are all on the site, and the server info page has the short version of everything above.