Sanguine is an OldSchool RuneScape server running a custom RuneLite client. The aim is simple: build the endgame PvM content properly, and give the Wilderness a reason to exist again.
The boss roster is native, not stubbed. The Inferno (waves 1 to 68, plus TzKal-Zuk), the Chambers of Xeric (the Great Olm), the Theatre of Blood (Verzik Vitur, with solo scaling), Nex and the Ancient Prison, Vorkath, Cerberus, the Corrupted Gauntlet, the Nightmare and Phosani's Nightmare, and Zulrah are all built against the actual OSRS wiki mechanics rather than a simplified copy.
The Wilderness runs on Blood Money. Blood revenants roam the wild and get stronger the deeper you go, up to the rare Blood Maledictus, alongside a parallel Blood Slayer track. Blood Money spends in a dedicated PvP shop, so Wilderness play earns something concrete instead of just risk.
Outside combat there is a genuine player-driven Grand Exchange (real order-book matching, not a shop-price skin), a rebuilt bank and equipment interface, a searchable boss drop-table viewer, and a leaderboard for kills and wealth.
This is an active hobby project - new content and fixes ship regularly, and it is run by someone who actually plays it. Bug reports and feedback are welcome.