diff --git a/sources/ClientRealm/ClientGlobal.uc b/sources/ClientRealm/ClientGlobal.uc
index 84236bd..c5e57e3 100644
--- a/sources/ClientRealm/ClientGlobal.uc
+++ b/sources/ClientRealm/ClientGlobal.uc
@@ -21,7 +21,6 @@
  */
 class ClientGlobal extends CoreGlobal;
 
-var protected bool initialized;
 //  `Global` is expected to behave like a singleton and will store it's
 //  main instance in this variable's default value.
 var protected ClientGlobal myself;
diff --git a/sources/CoreRealm/API/SideEffects/SideEffectAPI.uc b/sources/CoreRealm/API/SideEffects/SideEffectAPI.uc
index 614bde1..540ff12 100644
--- a/sources/CoreRealm/API/SideEffects/SideEffectAPI.uc
+++ b/sources/CoreRealm/API/SideEffects/SideEffectAPI.uc
@@ -1,6 +1,6 @@
 /**
- *      Simple API for managing a list of `SideEffect` info objects: can add,
- *  remove, return all and by package.
+ *      Standard implementation for simple API for managing a list of
+ *  `SideEffect` info objects: can add, remove, return all and by package.
  *      Copyright 2022 Anton Tarasenko
  *------------------------------------------------------------------------------
  * This file is part of Acedia.
@@ -18,16 +18,11 @@
  * You should have received a copy of the GNU General Public License
  * along with Acedia.  If not, see <https://www.gnu.org/licenses/>.
  */
-class SideEffectAPI extends AcediaObject;
+class SideEffectAPI extends SideEffectAPIBase;
 
 var private array<SideEffect> activeSideEffects;
 
-/**
- *  Returns all so far registered `SideEffect`s.
- *
- *  @return Array of all registered `SideEffect`s.
- */
-public final function array<SideEffect> GetAll()
+public function array<SideEffect> GetAll()
 {
     local int i;
 
@@ -37,17 +32,7 @@ public final function array<SideEffect> GetAll()
     return activeSideEffects;
 }
 
-/**
- *  Returns active `SideEffect` instance of the specified class
- *  `sideEffectClass`.
- *
- *  @param  sideEffectClass Class of side effect to return active instance of.
- *  @return Active `SideEffect` instance of the specified class
- *      `sideEffectClass`.
- *      `none` if either `sideEffectClass` is `none` or side effect of such
- *      class is not currently active.
- */
-public final function SideEffect GetClass(class<SideEffect> sideEffectClass)
+public function SideEffect GetClass(class<SideEffect> sideEffectClass)
 {
     local int i;
 
@@ -65,16 +50,7 @@ public final function SideEffect GetClass(class<SideEffect> sideEffectClass)
     return none;
 }
 
-/**
- *  Returns all so far registered `SideEffect`s from a package `packageName`
- *  (case insensitive).
- *
- *  @param  packageName Name opf the package, in `SideEffect`s from which we are
- *      interested. Must be not `none`.
- *  @return Array of all registered `SideEffect`s from a package `packageName`.
- *      If `none`, returns an empty array.
- */
-public final function array<SideEffect> GetFromPackage(BaseText packageName)
+public function array<SideEffect> GetFromPackage(BaseText packageName)
 {
     local int               i;
     local Text              nextPackage;
@@ -96,14 +72,7 @@ public final function array<SideEffect> GetFromPackage(BaseText packageName)
     return result;
 }
 
-/**
- *  Registers a new `SideEffect` object as active.
- *
- *  @param  newSideEffect   Instance of some `SideEffect` class to register as
- *      active side effect. Must not be `none`.
- *  @return `true` if new side effect was added and `false` otherwise.
- */
-public final function bool Add(SideEffect newSideEffect)
+public function bool Add(SideEffect newSideEffect)
 {
     local int i;
 
@@ -121,16 +90,7 @@ public final function bool Add(SideEffect newSideEffect)
     return true;
 }
 
-/**
- *  Removes `SideEffect` of the specified sub-class from the list of active
- *  side effects.
- *
- *  @param  sideEffectClass Class of the side effect to remove.
- *  @return `true` if some side effect was removed as a result of this operation
- *      and `false` otherise (even if there was no side effect of specified
- *      class to begin with).
- */
-public final function bool RemoveClass(
+public function bool RemoveClass(
     class<SideEffect> sideEffectClass)
 {
     local int i;
diff --git a/sources/CoreRealm/API/SideEffects/SideEffectAPIBase.uc b/sources/CoreRealm/API/SideEffects/SideEffectAPIBase.uc
new file mode 100644
index 0000000..14718ea
--- /dev/null
+++ b/sources/CoreRealm/API/SideEffects/SideEffectAPIBase.uc
@@ -0,0 +1,76 @@
+/**
+ *      Base class for simple API for managing a list of `SideEffect` info
+ *  objects: can add, remove, return all and by package.
+ *      Copyright 2022 Anton Tarasenko
+ *------------------------------------------------------------------------------
+ * This file is part of Acedia.
+ *
+ * Acedia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Acedia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Acedia.  If not, see <https://www.gnu.org/licenses/>.
+ */
+class SideEffectAPIBase extends AcediaObject
+    abstract;
+
+/**
+ *  Returns all so far registered `SideEffect`s.
+ *
+ *  @return Array of all registered `SideEffect`s.
+ */
+public function array<SideEffect> GetAll();
+
+/**
+ *  Returns active `SideEffect` instance of the specified class
+ *  `sideEffectClass`.
+ *
+ *  @param  sideEffectClass Class of side effect to return active instance of.
+ *  @return Active `SideEffect` instance of the specified class
+ *      `sideEffectClass`.
+ *      `none` if either `sideEffectClass` is `none` or side effect of such
+ *      class is not currently active.
+ */
+public function SideEffect GetClass(class<SideEffect> sideEffectClass);
+
+/**
+ *  Returns all so far registered `SideEffect`s from a package `packageName`
+ *  (case insensitive).
+ *
+ *  @param  packageName Name of the package, in `SideEffect`s from which we are
+ *      interested. Must be not `none`.
+ *  @return Array of all registered `SideEffect`s from a package `packageName`.
+ *      If `none`, returns an empty array.
+ */
+public function array<SideEffect> GetFromPackage(BaseText packageName);
+
+/**
+ *  Registers a new `SideEffect` object as active.
+ *
+ *  @param  newSideEffect   Instance of some `SideEffect` class to register as
+ *      active side effect. Must not be `none`.
+ *  @return `true` if new side effect was added and `false` otherwise.
+ */
+public function bool Add(SideEffect newSideEffect);
+
+/**
+ *  Removes `SideEffect` of the specified sub-class from the list of active
+ *  side effects.
+ *
+ *  @param  sideEffectClass Class of the side effect to remove.
+ *  @return `true` if some side effect was removed as a result of this operation
+ *      and `false` otherwise (even if there was no side effect of specified
+ *      class to begin with).
+ */
+public function bool RemoveClass(class<SideEffect> sideEffectClass);
+
+defaultproperties
+{
+}
\ No newline at end of file
diff --git a/sources/CoreRealm/AcediaAdapter.uc b/sources/CoreRealm/AcediaAdapter.uc
new file mode 100644
index 0000000..683210b
--- /dev/null
+++ b/sources/CoreRealm/AcediaAdapter.uc
@@ -0,0 +1,30 @@
+/**
+ *  Base class for objects that will provide an access to a Acedia's client- and
+ *  server-specific functionality by giving a reference to this object to all
+ *  Acedia's objects and actors, emulating a global API namespace.
+ *      Copyright 2022 Anton Tarasenko
+ *------------------------------------------------------------------------------
+ * This file is part of Acedia.
+ *
+ * Acedia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Acedia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Acedia.  If not, see <https://www.gnu.org/licenses/>.
+ */
+class AcediaAdapter extends AcediaObject
+    abstract;
+
+var public const class<SideEffectAPIBase>  sideEffectAPIClass;
+
+defaultproperties
+{
+    SideEffectAPIClass = class'SideEffectAPI'
+}
\ No newline at end of file
diff --git a/sources/CoreRealm/CoreGlobal.uc b/sources/CoreRealm/CoreGlobal.uc
index ffc8709..577aa40 100644
--- a/sources/CoreRealm/CoreGlobal.uc
+++ b/sources/CoreRealm/CoreGlobal.uc
@@ -21,16 +21,53 @@
  */
 class CoreGlobal extends Object;
 
-var public SideEffectAPI sideEffects;
+var protected bool                  initialized;
+var protected class<AcediaAdapter>  adapterClass;
 
+var public SideEffectAPIBase sideEffects;
+
+var private LoggerAPI.Definition fatNoAdapterClass;
+
+/**
+ *  This method must perform initialization of the caller `...Global` instance.
+ *
+ *  It must only be executed once (execution should be marked using
+ *  `initialized` flag).
+ */
 protected function Initialize()
 {
     local MemoryAPI api;
 
+    if (initialized) {
+        return;
+    }
+    initialized = true;
+    if (adapterClass == none)
+    {
+        class'Global'.static.GetInstance().logger
+            .Auto(fatNoAdapterClass)
+            .ArgClass(self.class);
+        return;
+    }
     api = class'Global'.static.GetInstance().memory;
-    sideEffects = SideEffectAPI(api.Allocate(class'SideEffectAPI'));
+    sideEffects =
+        SideEffectAPI(api.Allocate(adapterClass.default.sideEffectAPIClass));
 }
 
+/**
+ *  Changes adapter class for the caller `...Global` instance.
+ *
+ *  Must not do anything when caller `...Global` instance was already
+ *  initialized or when passed adapter class is `none`.
+ *
+ *  @param  newAdapter  New adapter class to use in the caller `...Global`
+ *      instance.
+ *  @return `true` if new adapter was set and `false` otherwise.
+ */
+public function bool SetAdapter(class<AcediaAdapter> newAdapter);
+
 defaultproperties
 {
+    adapterClass = class'AcediaAdapter'
+    fatNoAdapterClass = (l=LOG_Fatal,m="`none` specified as an adapter for `%1` level core class. This should not have happened. AcediaCore cannot properly function.")
 }
\ No newline at end of file
diff --git a/sources/ServerRealm/ServerGlobal.uc b/sources/ServerRealm/ServerGlobal.uc
index 545db19..646be25 100644
--- a/sources/ServerRealm/ServerGlobal.uc
+++ b/sources/ServerRealm/ServerGlobal.uc
@@ -21,7 +21,6 @@
  */
 class ServerGlobal extends CoreGlobal;
 
-var protected bool initialized;
 //  `Global` is expected to behave like a singleton and will store it's
 //  main instance in this variable's default value.
 var protected ServerGlobal myself;