diff --git a/AI/Nullkiller/Engine/PriorityEvaluator.cpp b/AI/Nullkiller/Engine/PriorityEvaluator.cpp
index 77411dac6..d01ea5e22 100644
--- a/AI/Nullkiller/Engine/PriorityEvaluator.cpp
+++ b/AI/Nullkiller/Engine/PriorityEvaluator.cpp
@@ -588,6 +588,8 @@ float RewardEvaluator::getSkillReward(const CGObjectInstance * target, const CGH
 	case Obj::PANDORAS_BOX:
 		//Can contains experience, spells, or skills (only on custom maps)
 		return 2.5f;
+	case Obj::PYRAMID:
+		return 3.0f;
 	case Obj::HERO:
 		return ai->cb->getPlayerRelations(target->tempOwner, ai->playerID) == PlayerRelations::ENEMIES
 			? enemyHeroEliminationSkillRewardRatio * dynamic_cast<const CGHeroInstance *>(target)->level
diff --git a/client/CMT.cpp b/client/CMT.cpp
index e3b6780f9..8ad12ae73 100644
--- a/client/CMT.cpp
+++ b/client/CMT.cpp
@@ -462,9 +462,9 @@ static void mainLoop()
 	{
 		if(CSH->client)
 			CSH->endGameplay();
-	}
 
-	GH.windows().clear();
+		GH.windows().clear();
+	}
 
 	CMM.reset();
 
diff --git a/client/CServerHandler.cpp b/client/CServerHandler.cpp
index 4b3ef7adf..ee3f47164 100644
--- a/client/CServerHandler.cpp
+++ b/client/CServerHandler.cpp
@@ -617,7 +617,9 @@ bool CServerHandler::validateGameStart(bool allowOnlyAI) const
 void CServerHandler::sendStartGame(bool allowOnlyAI) const
 {
 	verifyStateBeforeStart(allowOnlyAI ? true : settings["session"]["onlyai"].Bool());
-	GH.windows().createAndPushWindow<CLoadingScreen>();
+
+	if(!settings["session"]["headless"].Bool())
+		GH.windows().createAndPushWindow<CLoadingScreen>();
 	
 	LobbyStartGame lsg;
 	if(client)
diff --git a/client/Client.cpp b/client/Client.cpp
index 10c2b64e9..f5cba4024 100644
--- a/client/Client.cpp
+++ b/client/Client.cpp
@@ -411,7 +411,7 @@ void CClient::initPlayerEnvironments()
 			hasHumanPlayer = true;
 	}
 
-	if(!hasHumanPlayer)
+	if(!hasHumanPlayer && !settings["session"]["headless"].Bool())
 	{
 		Settings session = settings.write["session"];
 		session["spectate"].Bool() = true;
@@ -436,7 +436,7 @@ void CClient::initPlayerInterfaces()
 		if(!vstd::contains(playerint, color))
 		{
 			logNetwork->info("Preparing interface for player %s", color.toString());
-			if(playerInfo.second.isControlledByAI())
+			if(playerInfo.second.isControlledByAI() || settings["session"]["onlyai"].Bool())
 			{
 				bool alliedToHuman = false;
 				for(auto & allyInfo : gs->scenarioOps->playerInfos)
diff --git a/client/NetPacksClient.cpp b/client/NetPacksClient.cpp
index 1b7ab14c1..2d9e89eaf 100644
--- a/client/NetPacksClient.cpp
+++ b/client/NetPacksClient.cpp
@@ -157,6 +157,9 @@ void ApplyClientNetPackVisitor::visitSetMana(SetMana & pack)
 	const CGHeroInstance *h = cl.getHero(pack.hid);
 	callInterfaceIfPresent(cl, h->tempOwner, &IGameEventsReceiver::heroManaPointsChanged, h);
 
+	if(settings["session"]["headless"].Bool())
+		return;
+
 	for (auto window : GH.windows().findWindows<BattleWindow>())
 		window->heroManaPointsChanged(h);
 }
@@ -467,7 +470,8 @@ void ApplyFirstClientNetPackVisitor::visitRemoveObject(RemoveObject & pack)
 			i->second->objectRemoved(o, pack.initiator);
 	}
 
-	CGI->mh->waitForOngoingAnimations();
+	if(CGI->mh)
+		CGI->mh->waitForOngoingAnimations();
 }
 
 void ApplyClientNetPackVisitor::visitRemoveObject(RemoveObject & pack)
@@ -553,9 +557,11 @@ void ApplyClientNetPackVisitor::visitNewStructures(NewStructures & pack)
 	}
 
 	// invalidate section of map view with our object and force an update
-	CGI->mh->onObjectInstantRemove(town, town->getOwner());
-	CGI->mh->onObjectInstantAdd(town, town->getOwner());
-
+	if(CGI->mh)
+	{
+		CGI->mh->onObjectInstantRemove(town, town->getOwner());
+		CGI->mh->onObjectInstantAdd(town, town->getOwner());
+	}
 }
 void ApplyClientNetPackVisitor::visitRazeStructures(RazeStructures & pack)
 {
@@ -566,8 +572,11 @@ void ApplyClientNetPackVisitor::visitRazeStructures(RazeStructures & pack)
 	}
 
 	// invalidate section of map view with our object and force an update
-	CGI->mh->onObjectInstantRemove(town, town->getOwner());
-	CGI->mh->onObjectInstantAdd(town, town->getOwner());
+	if(CGI->mh)
+	{
+		CGI->mh->onObjectInstantRemove(town, town->getOwner());
+		CGI->mh->onObjectInstantAdd(town, town->getOwner());
+	}
 }
 
 void ApplyClientNetPackVisitor::visitSetAvailableCreatures(SetAvailableCreatures & pack)
@@ -651,7 +660,7 @@ void ApplyFirstClientNetPackVisitor::visitSetObjectProperty(SetObjectProperty &
 	}
 
 	// invalidate section of map view with our object and force an update with new flag color
-	if (pack.what == ObjProperty::OWNER)
+	if (pack.what == ObjProperty::OWNER && CGI->mh)
 	{
 		auto object = gs.getObjInstance(pack.id);
 		CGI->mh->onObjectInstantRemove(object, object->getOwner());
@@ -668,7 +677,7 @@ void ApplyClientNetPackVisitor::visitSetObjectProperty(SetObjectProperty & pack)
 	}
 
 	// invalidate section of map view with our object and force an update with new flag color
-	if (pack.what == ObjProperty::OWNER)
+	if (pack.what == ObjProperty::OWNER && CGI->mh)
 	{
 		auto object = gs.getObjInstance(pack.id);
 		CGI->mh->onObjectInstantAdd(object, object->getOwner());
@@ -1023,7 +1032,9 @@ void ApplyClientNetPackVisitor::visitNewObject(NewObject & pack)
 		if(gs.isVisible(obj, i->first))
 			i->second->newObject(obj);
 	}
-	CGI->mh->waitForOngoingAnimations();
+
+	if(CGI->mh)
+		CGI->mh->waitForOngoingAnimations();
 }
 
 void ApplyClientNetPackVisitor::visitSetAvailableArtifacts(SetAvailableArtifacts & pack)