diff --git a/.gitignore b/.gitignore
index 9a0a2daf..fe9459bb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,6 +19,7 @@ bin/
 .idea/
 .vscode/
 .DS_Store
+.cache/
 
 # IDA
 *.id0
diff --git a/data/uking_functions.csv b/data/uking_functions.csv
index 335f4fe0..dabd36db 100644
--- a/data/uking_functions.csv
+++ b/data/uking_functions.csv
@@ -53057,32 +53057,32 @@ Address,Quality,Size,Name
 0x00000071008a5c94,O,000152,_ZN4ksys3res12EntryFactoryINS0_7ArchiveEE12newResource_EPN4sead4HeapEi
 0x00000071008a5d2c,O,000008,_ZNK4ksys3res12EntryFactoryINS0_7ArchiveEE15getResourceSizeEv
 0x00000071008a5d34,O,000008,_ZNK4ksys3res12EntryFactoryINS0_7ArchiveEE20getLoadDataAlignmentEv
-0x00000071008a5d3c,U,000096,
-0x00000071008a5d9c,U,000104,
-0x00000071008a5e04,U,000312,E3Mgr::createInstance
-0x00000071008a5f3c,U,000268,E3Mgr::isDemoMode
-0x00000071008a6048,U,000048,E3Mgr::setIsDemoMode
-0x00000071008a6078,U,000144,isRID_Demo
-0x00000071008a6108,U,000064,E3Mgr::__auto1
-0x00000071008a6148,U,000068,E3Mgr::__auto0
-0x00000071008a618c,U,000068,E3Mgr::__auto9
-0x00000071008a61d0,U,000164,E3Mgr::isRID_Demo_and_a1x28_is_one
-0x00000071008a6274,U,000164,isRID_Demo_and_a1x28_is_one_
-0x00000071008a6318,U,000156,isRID_Demo_and_a1x6f_is_nonzero
-0x00000071008a63b4,U,000068,E3Mgr::__auto4
-0x00000071008a63f8,U,000008,E3Mgr::setDemoStage
-0x00000071008a6400,U,000008,E3Mgr::setDemoMode
-0x00000071008a6408,U,000008,
-0x00000071008a6410,U,000012,
-0x00000071008a641c,U,000008,E3Mgr::setTimerMaybe
-0x00000071008a6424,U,000008,E3Mgr::__auto5
-0x00000071008a642c,U,000128,E3Mgr::loadBuildTimeStubbed
-0x00000071008a64ac,U,000008,E3Mgr::resIsReady
-0x00000071008a64b4,U,000232,E3Mgr::setEmptyStr
-0x00000071008a659c,U,000160,E3Mgr::setIsRIDDemo
-0x00000071008a663c,U,000012,E3Mgr::__auto8
-0x00000071008a6648,U,000036,E3Mgr::__auto2
-0x00000071008a666c,U,000240,E3Mgr::__auto3
+0x00000071008a5d3c,O,000096,_ZN5uking5E3Mgr18SingleE3tonDisposer_D1Ev
+0x00000071008a5d9c,O,000104,_ZN5uking5E3Mgr18SingletonDisposer_D0Ev
+0x00000071008a5e04,O,000312,_ZN5uking5E3Mgr14createInstanceEPN4sead4HeapE
+0x00000071008a5f3c,O,000268,_ZNK5uking5E3Mgr10isDemoModeEv
+0x00000071008a6048,O,000048,_ZN5uking5E3Mgr13setIsDemoModeEb
+0x00000071008a6078,O,000144,_ZNK5uking5E3Mgr10is2017DemoEv
+0x00000071008a6108,O,000064,_ZNK5uking5E3Mgr28isDemoMode0AndNotStageSelectEv
+0x00000071008a6148,O,000068,_ZNK5uking5E3Mgr28isDemoMode1AndNotStageSelectEv
+0x00000071008a618c,O,000068,_ZNK5uking5E3Mgr28isDemoMode2AndNotStageSelectEv
+0x00000071008a61d0,O,000164,_ZNK5uking5E3Mgr19isRidDemoAnd28IsOneEv
+0x00000071008a6274,O,000164,_ZNK5uking5E3Mgr20isRidDemoAnd28IsOne_Ev
+0x00000071008a6318,O,000156,_ZNK5uking5E3Mgr23isRidDemoAnd6fIsNonzeroEv
+0x00000071008a63b4,O,000068,_ZNK5uking5E3Mgr12getDemoStageEv
+0x00000071008a63f8,O,000008,_ZN5uking5E3Mgr12setDemoStageEi
+0x00000071008a6400,O,000008,_ZN5uking5E3Mgr11setDemoModeEi
+0x00000071008a6408,O,000008,_ZN5uking5E3Mgr7clear28Ev
+0x00000071008a6410,O,000012,_ZN5uking5E3Mgr5set28Ev
+0x00000071008a641c,O,000008,_ZN5uking5E3Mgr13setTimerMaybeEi
+0x00000071008a6424,O,000008,_ZNK5uking5E3Mgr5get2CEv
+0x00000071008a642c,O,000128,_ZN5uking5E3Mgr20loadBuildTimeStubbedEv
+0x00000071008a64ac,O,000008,_ZN5uking5E3Mgr10resIsReadyEv
+0x00000071008a64b4,O,000232,_ZN5uking5E3Mgr11setEmptyStrEv
+0x00000071008a659c,O,000160,_ZN5uking5E3Mgr12setIsRidDemoEb
+0x00000071008a663c,O,000012,_ZN5uking5E3Mgr5set6CEb
+0x00000071008a6648,O,000036,_ZN5uking5E3Mgr6_auto2Ev
+0x00000071008a666c,O,000240,_ZN5uking5E3Mgr6_auto3Ev
 0x00000071008a675c,U,001932,E3Mgr::calc
 0x00000071008a6ee8,U,000428,
 0x00000071008a7094,U,000360,
diff --git a/lib/NintendoSDK b/lib/NintendoSDK
index 3077c49a..c355f876 160000
--- a/lib/NintendoSDK
+++ b/lib/NintendoSDK
@@ -1 +1 @@
-Subproject commit 3077c49affa2770c5336764ca062ed50e7444b5b
+Subproject commit c355f876626638d265c7eb7bf90928e25e161bec
diff --git a/lib/sead b/lib/sead
index 79f528be..24d64b12 160000
--- a/lib/sead
+++ b/lib/sead
@@ -1 +1 @@
-Subproject commit 79f528be96a3d7c844847ab6371e0ae6b38c83c7
+Subproject commit 24d64b1255378c36299f84a28297e16e37b8e569
diff --git a/src/Game/CMakeLists.txt b/src/Game/CMakeLists.txt
index 944173ae..8b2a312e 100644
--- a/src/Game/CMakeLists.txt
+++ b/src/Game/CMakeLists.txt
@@ -11,4 +11,6 @@ target_sources(uking PRIVATE
   gameScene.h
   gameStageInfo.cpp
   gameStageInfo.h
+  E3Mgr.cpp
+  E3Mgr.h
 )
diff --git a/src/Game/E3Mgr.cpp b/src/Game/E3Mgr.cpp
new file mode 100644
index 00000000..61b7e60b
--- /dev/null
+++ b/src/Game/E3Mgr.cpp
@@ -0,0 +1,181 @@
+#include "E3Mgr.h"
+#include "KingSystem/Map/mapAutoPlacementMgr.h"
+#include "KingSystem/Map/mapPlacementMgr.h"
+#include "KingSystem/Resource/resLoadRequest.h"
+#include "controller/seadController.h"
+#include "devenv/seadEnvUtil.h"
+#include "prim/seadSafeString.h"
+
+/* Not yet attempted:
+ * E3Mgr::calc - Requires SeadController and globals
+ * sub_71008A6EE8 - Requires SeadController
+ * sub_71008A7094 - Requires RTTI from not decompiled classes
+ */
+
+extern bool isStageSelectState();
+
+using PlacementMgr = ksys::map::PlacementMgr;
+
+namespace uking {
+
+SEAD_SINGLETON_DISPOSER_IMPL(E3Mgr)
+
+bool E3Mgr::isDemoMode() const {
+    if (E3Mgr::is2017Demo()) {
+        return true;
+    }
+    if (E3Mgr::isRidDemo()) {
+        return true;
+    }
+
+    return mForceDemoMode;
+}
+
+void E3Mgr::setIsDemoMode(bool demoMode) {
+    mForceDemoMode = demoMode;
+    PlacementMgr::sFlags.set(PlacementMgr::MgrStaticFlags::DemoMode);
+    if (!demoMode) {
+        PlacementMgr::sFlags.reset(PlacementMgr::MgrStaticFlags::DemoMode);
+    }
+}
+
+bool E3Mgr::is2017Demo() const {
+    return sead::EnvUtil::getRomType() == "Show_2017_1st";
+}
+
+bool E3Mgr::isRidDemo() const {
+    return sead::EnvUtil::getRomType() == "RID_Demo";
+}
+
+void E3Mgr::clear28() {
+    _28 = 0;
+}
+
+void E3Mgr::set28() {
+    _28 = 1;
+}
+
+bool E3Mgr::isDemoMode0AndNotStageSelect() const {
+    return E3Mgr::isDemoMode() && mDemoMode == 0 && !isStageSelectState();
+}
+
+bool E3Mgr::isDemoMode1AndNotStageSelect() const {
+    return E3Mgr::isDemoMode() && mDemoMode == 1 && !isStageSelectState();
+}
+
+bool E3Mgr::isDemoMode2AndNotStageSelect() const {
+    return E3Mgr::isDemoMode() && mDemoMode == 2 && !isStageSelectState();
+}
+
+bool E3Mgr::is28One() const {
+    return _28 == 1;
+}
+
+bool E3Mgr::isRidDemoAnd28IsOne() const {
+    if (isRidDemo() && is28One()) {
+        return true;
+    }
+    return false;
+}
+
+bool E3Mgr::isRidDemoAnd28IsOne_() const {
+    if ((isRidDemo() && is28One())) {
+        return true;
+    }
+    return false;
+}
+
+bool E3Mgr::isRidDemoAnd6fIsNonzero() const {
+    return isRidDemo() && _6f != 0;
+}
+
+s32 E3Mgr::getDemoStage() const {
+    if ((isDemoMode()) && (mDemoMode == 2) && (isStageSelectState() == 0)) {
+        return mDemoStage;
+    }
+    return -1;
+}
+
+void E3Mgr::setDemoStage(s32 demoStage) {
+    mDemoStage = demoStage;
+}
+
+void E3Mgr::setDemoMode(s32 demoMode) {
+    mDemoMode = demoMode;
+}
+
+void E3Mgr::setTimerMaybe(s32 a2) {
+    _2C = a2;
+}
+
+s32 E3Mgr::get2C() const {
+    return _2C;
+}
+
+void E3Mgr::loadBuildTimeStubbed() {
+    ksys::res::LoadRequest req;
+
+    req._21 = true;
+    req._22 = true;
+    req.mLoadCompressed = true;
+    req.mRequester = "E3Mgr";
+    req.mPath = "System/BuildTime.txt";
+}
+
+s32 E3Mgr::resIsReady() {
+    return true;
+}
+
+void E3Mgr::setEmptyStr() {
+    mStr = sead::SafeStringBase<char>::cEmptyString;
+}
+
+void E3Mgr::setIsRidDemo(bool a2) {
+    if (isRidDemo()) {
+        mIsRidDemo2 = a2;
+    }
+}
+
+void E3Mgr::set6C(bool a2) {
+    _6c = a2;
+}
+
+void E3Mgr::_auto2() {
+    E3Mgr::_auto3();
+    _6d = 0;
+}
+
+//! TODO : this should be a real struct
+struct Dummy {
+    char _0[0xA00];
+    u32 a00;
+};
+
+extern Dummy* test;
+
+void E3Mgr::_auto3() {
+    bool isDemo;
+
+    _6a = 0;
+    _68 = 0;
+    _69 = 0;
+    _6e = 0;
+    _6f = 0;
+    mIsRidDemo = false;
+    mIsRidDemo2 = false;
+
+    if (!isRidDemo() || !_6c) {
+        mTick1.setNow();
+    }
+    mTick2.setNow();
+    mTick3.setNow();
+    mTick4.setNow();
+    _30 = -2;
+    isDemo = E3Mgr::isDemoMode();
+    if (isDemo) {
+        if (test)
+            test->a00 |= 0x40;
+    }
+}
+
+}  // namespace uking
diff --git a/src/Game/E3Mgr.h b/src/Game/E3Mgr.h
new file mode 100644
index 00000000..dcc75e40
--- /dev/null
+++ b/src/Game/E3Mgr.h
@@ -0,0 +1,87 @@
+#pragma once
+
+#include <nn/os.h>
+
+#include <basis/seadTypes.h>
+#include <heap/seadDisposer.h>
+#include <prim/seadSafeString.h>
+#include <time/seadTickSpan.h>
+#include <time/seadTickTime.h>
+
+#include "KingSystem/Resource/resHandle.h"
+
+namespace uking {
+
+class E3Mgr {
+    E3Mgr() = default;
+    SEAD_SINGLETON_DISPOSER(E3Mgr)
+
+public:
+    bool isDemoMode() const;
+    void setIsDemoMode(bool demoMode);
+    bool isRidDemo() const;
+    bool is2017Demo() const;
+
+    void clear28();
+    void set28();
+    bool isDemoMode0AndNotStageSelect() const;
+    bool isDemoMode1AndNotStageSelect() const;
+    bool isDemoMode2AndNotStageSelect() const;
+    void _auto2();
+    void _auto3();
+
+    void set6C(bool a2);
+
+    bool isRidDemoAnd28IsOne() const;
+    bool isRidDemoAnd28IsOne_() const;
+    bool isRidDemoAnd6fIsNonzero() const;
+
+    void setDemoStage(s32 demoStage);
+    void setDemoMode(s32 demoMode);
+
+    void setTimerMaybe(s32 a2);
+    s32 resIsReady();
+
+    s32 get2C() const;
+    s32 getDemoStage() const;
+
+    bool is28One() const;
+
+    void loadBuildTimeStubbed();
+
+    void setEmptyStr();
+
+    void setIsRidDemo(bool a2);
+
+    E3Mgr* sub_71008A6EE8();
+
+private:
+    bool mForceDemoMode = false;
+    u32 mDemoMode = 0;
+    u32 _28 = 0;
+    s32 _2C = 1200;
+    s32 _30 = -2;
+    sead::TickTime mTick1;
+    sead::TickTime mTick2;
+    sead::TickTime mTick3;
+    sead::TickTime mTick4;
+    sead::TickTime mTick5;
+    sead::TickTime mTick6;
+    u8 _68 = 0;
+    u8 _69 = 0;
+    u8 _6a = 0;
+    bool mIsRidDemo = false;
+    u8 _6c = 0;
+    u8 _6d = 1;
+    u8 _6e = 0;
+    u8 _6f = 0;
+    bool mIsRidDemo2 = false;
+
+    sead::FixedSafeString<32> mStr;
+
+    ksys::res::Handle mHandle;
+
+    s32 mDemoStage = -1;
+};
+
+}  // namespace uking
diff --git a/src/KingSystem/Map/mapPlacementMgr.h b/src/KingSystem/Map/mapPlacementMgr.h
index b5dacda9..972159f0 100644
--- a/src/KingSystem/Map/mapPlacementMgr.h
+++ b/src/KingSystem/Map/mapPlacementMgr.h
@@ -78,7 +78,7 @@ public:
 
     bool isGrudgeMerge() const { return sFlags.isOn(MgrStaticFlags::GrudgeMerge); }
 
-    static sead::TypedBitFlag<MgrStaticFlags, u32> sFlags;
+    static sead::TypedBitFlag<MgrStaticFlags, u16> sFlags;
 
     u32 _28;
     u32 _2c = 0;