diff --git a/src/client/ClientServices.cpp b/src/client/ClientServices.cpp
index 257670c..9c073fa 100644
--- a/src/client/ClientServices.cpp
+++ b/src/client/ClientServices.cpp
@@ -58,6 +58,14 @@ ClientServices* ClientServices::GetInstance() {
     return ClientServices::s_instance;
 }
 
+REALM_INFO* ClientServices::GetRealmInfoByIndex(int32_t index) {
+    if (index >= ClientServices::GetInstance()->m_realmList.Count()) {
+        return nullptr;
+    }
+
+    return &ClientServices::GetInstance()->m_realmList[index];
+}
+
 const char* ClientServices::GetSelectedRealmName() {
     if (!ClientServices::s_realmNameVar) {
         ClientServices::s_realmNameVar = CVar::Register(
diff --git a/src/client/ClientServices.hpp b/src/client/ClientServices.hpp
index 83182ce..0d96965 100644
--- a/src/client/ClientServices.hpp
+++ b/src/client/ClientServices.hpp
@@ -25,6 +25,7 @@ class ClientServices : public LoginResponse {
         static void ConnectToSelectedServer();
         static ClientConnection* Connection();
         static ClientServices* GetInstance();
+        static REALM_INFO* GetRealmInfoByIndex(int32_t index);
         static const char* GetSelectedRealmName();
         static void Initialize();
         static Login* LoginConnection();
diff --git a/src/glue/CRealmList.cpp b/src/glue/CRealmList.cpp
index fd5ac25..3509ee7 100644
--- a/src/glue/CRealmList.cpp
+++ b/src/glue/CRealmList.cpp
@@ -1,8 +1,15 @@
 #include "glue/CRealmList.hpp"
+#include "client/ClientServices.hpp"
 #include "db/Db.hpp"
+#include "ui/FrameScript.hpp"
+#include <new>
 #include <storm/Memory.hpp>
+#include <storm/String.hpp>
 
+float CRealmList::s_avgLoad;
 TSFixedArray<RealmCategory*> CRealmList::s_categories;
+int32_t CRealmList::s_preferredCategory = -1;
+int32_t CRealmList::s_selectedCategory = -1;
 
 void CRealmList::Initialize() {
     CRealmList::s_categories.SetCount(g_cfg_CategoriesDB.m_numRecords);
@@ -20,5 +27,73 @@ void CRealmList::Initialize() {
 }
 
 void CRealmList::UpdateList() {
-    // TODO
+    CRealmList::s_avgLoad = 0.0f;
+    int32_t category = -1;
+    auto realmCount = ClientServices::GetInstance()->m_realmList.Count();
+
+    for (int32_t realmIndex = 0; realmIndex < realmCount; realmIndex++) {
+        auto realmInfo = ClientServices::GetRealmInfoByIndex(realmIndex);
+        if (!realmInfo) {
+            continue;
+        }
+
+        auto selectedRealmName = ClientServices::GetSelectedRealmName();
+
+        if (!SStrCmpI(selectedRealmName, realmInfo->name, STORM_MAX_STR) /* TODO SStrCmpUTF8I */) {
+            if (CRealmList::s_preferredCategory < 0) {
+                CRealmList::s_preferredCategory = realmInfo->category;
+            }
+
+            category = realmInfo->category;
+        }
+
+        CRealmList::s_avgLoad += realmInfo->population;
+
+        for (int32_t categoryIndex = 0; categoryIndex < CRealmList::s_categories.Count(); categoryIndex++) {
+            auto realmCategory = CRealmList::s_categories[categoryIndex];
+
+            if (realmInfo->category != realmCategory->m_category->m_ID) {
+                continue;
+            }
+
+            if (realmCategory->m_realms.Count() == realmCategory->uint14) {
+                realmCategory->m_realms.SetCount(realmCategory->uint14 + 1);
+            }
+
+            realmCategory->m_realms[realmCategory->uint14] = realmIndex;
+            realmCategory->uint14++;
+        }
+    }
+
+    if (realmCount <= 1) {
+        CRealmList::s_avgLoad = 1.0f;
+    } else {
+        // TODO
+    }
+
+    // TODO CRealmList::m_stdDevLoad
+
+    // TODO sort realm list
+
+    for (int32_t i = 0; i < CRealmList::s_categories.Count(); i++) {
+        if (CRealmList::s_categories[i]->m_category->m_ID == category) {
+            CRealmList::s_selectedCategory = i;
+        }
+    }
+
+    if (CRealmList::s_preferredCategory != -1 /* TODO || ClientServices::Connection()->uint2F10 */) {
+        FrameScript_SignalEvent(9, nullptr);
+    } else {
+        uint32_t nonEmptyCategories = 0;
+
+        for (uint32_t i = 0; i < CRealmList::s_categories.Count(); i++) {
+            auto realmCategory = CRealmList::s_categories[i];
+
+            if (realmCategory && realmCategory->uint14 != 0) {
+                nonEmptyCategories++;
+            }
+        }
+
+        FrameScript_SignalEvent(10, "%d", nonEmptyCategories);
+    }
 }
diff --git a/src/glue/CRealmList.hpp b/src/glue/CRealmList.hpp
index fe2a992..35ad34d 100644
--- a/src/glue/CRealmList.hpp
+++ b/src/glue/CRealmList.hpp
@@ -15,7 +15,10 @@ struct RealmCategory {
 class CRealmList {
     public:
         // Static variables
+        static float s_avgLoad;
         static TSFixedArray<RealmCategory*> s_categories;
+        static int32_t s_preferredCategory;
+        static int32_t s_selectedCategory;
 
         // Static functions
         static void Initialize();