diff --git a/src/ai/ai_core.cpp b/src/ai/ai_core.cpp
new file mode 100644
--- /dev/null
+++ b/src/ai/ai_core.cpp
@@ -0,0 +1,254 @@
+/* $Id$ */
+
+/** @file ai_core.cpp Implementation of AI. */
+
+#include "../stdafx.h"
+#include "../openttd.h"
+#include "../company_type.h"
+#include "../company_base.h"
+#include "../company_func.h"
+#include "../debug.h"
+#include "../network/network.h"
+#include "../settings_type.h"
+#include "../window_type.h"
+#include "../window_func.h"
+#include "../command_func.h"
+#include "ai.hpp"
+#include "ai_info.hpp"
+#include "ai_scanner.hpp"
+#include "ai_instance.hpp"
+#include "ai_config.hpp"
+
+/* static */ uint AI::frame_counter = 0;
+/* static */ AIScanner *AI::ai_scanner = NULL;
+
+/* static */ bool AI::CanStartNew()
+{
+	/* Only allow new AIs on the server and only when that is allowed in multiplayer */
+	return !_networking || (_network_server && _settings_game.ai.ai_in_multiplayer);
+}
+
+/* static */ void AI::StartNew(CompanyID company)
+{
+	assert(IsValidCompanyID(company));
+
+	/* Clients shouldn't start AIs */
+	if (_networking && !_network_server) return;
+
+	AIInfo *info = AIConfig::GetConfig(company)->GetInfo();
+	if (info == NULL) {
+		info = AI::ai_scanner->SelectRandomAI();
+		assert(info != NULL);
+		/* Load default data and store the name in the settings */
+		AIConfig::GetConfig(company)->ChangeAI(info->GetDirName());
+	}
+
+	_current_company = company;
+	Company *c = GetCompany(company);
+
+	c->ai_info = info;
+	c->ai_instance = new AIInstance(info);
+
+	InvalidateWindowData(WC_AI_DEBUG, 0, -1);
+	return;
+}
+
+/* static */ void AI::GameLoop()
+{
+	/* If we are in networking, only servers run this function, and that only if it is allowed */
+	if (_networking && (!_network_server || !_settings_game.ai.ai_in_multiplayer)) return;
+
+	/* The speed with which AIs go, is limited by the 'competitor_speed' */
+	AI::frame_counter++;
+	assert(_settings_game.difficulty.competitor_speed <= 4);
+	if ((AI::frame_counter & ((1 << (4 - _settings_game.difficulty.competitor_speed)) - 1)) != 0) return;
+
+	const Company *c;
+	FOR_ALL_COMPANIES(c) {
+		if (!IsHumanCompany(c->index)) {
+			_current_company = c->index;
+			c->ai_instance->GameLoop();
+		}
+	}
+
+	_current_company = OWNER_NONE;
+}
+
+/* static */ uint AI::GetTick()
+{
+	return AI::frame_counter;
+}
+
+/* static */ void AI::Stop(CompanyID company)
+{
+	if (_networking && !_network_server) return;
+
+	_current_company = company;
+	Company *c = GetCompany(company);
+
+	delete c->ai_instance;
+	c->ai_instance = NULL;
+
+	InvalidateWindowData(WC_AI_DEBUG, 0, -1);
+}
+
+/* static */ void AI::KillAll()
+{
+	/* It might happen there are no companies .. than we have nothing to loop */
+	if (GetCompanyPoolSize() == 0) return;
+
+	const Company *c;
+	FOR_ALL_COMPANIES(c) {
+		if (!IsHumanCompany(c->index)) AI::Stop(c->index);
+	}
+}
+
+/* static */ void AI::Initialize()
+{
+	if (AI::ai_scanner != NULL) AI::Uninitialize(true);
+
+	AI::frame_counter = 0;
+	if (AI::ai_scanner == NULL) AI::ai_scanner = new AIScanner();
+}
+
+/* static */ void AI::Uninitialize(bool keepConfig)
+{
+	AI::KillAll();
+
+	if (keepConfig) {
+		/* Run a rescan, which indexes all AIInfos again, and check if we can
+		 *  still load all the AIS, while keeping the configs in place */
+		Rescan();
+	} else {
+		delete AI::ai_scanner;
+		AI::ai_scanner = NULL;
+
+		for (CompanyID c = COMPANY_FIRST; c < MAX_COMPANIES; c++) {
+			if (_settings_game.ai_config[c] != NULL) {
+				delete _settings_game.ai_config[c];
+				_settings_game.ai_config[c] = NULL;
+			}
+			if (_settings_newgame.ai_config[c] != NULL) {
+				delete _settings_newgame.ai_config[c];
+				_settings_newgame.ai_config[c] = NULL;
+			}
+		}
+	}
+}
+
+/* static */ void AI::ResetConfig()
+{
+	/* Check for both newgame as current game if we can reload the AIInfo insde
+	 *  the AIConfig. If not, remove the AI from the list (which will assign
+	 *  a random new AI on reload). */
+	for (CompanyID c = COMPANY_FIRST; c < MAX_COMPANIES; c++) {
+		if (_settings_game.ai_config[c] != NULL && _settings_game.ai_config[c]->HasAI()) {
+			if (!_settings_game.ai_config[c]->ResetInfo()) {
+				DEBUG(ai, 0, "After a reload, the AI by the name '%s' was no longer found, and removed from the list.", _settings_game.ai_config[c]->GetName());
+				_settings_game.ai_config[c]->ChangeAI(NULL);
+			}
+		}
+		if (_settings_newgame.ai_config[c] != NULL && _settings_newgame.ai_config[c]->HasAI()) {
+			if (!_settings_newgame.ai_config[c]->ResetInfo()) {
+				DEBUG(ai, 0, "After a reload, the AI by the name '%s' was no longer found, and removed from the list.", _settings_newgame.ai_config[c]->GetName());
+				_settings_newgame.ai_config[c]->ChangeAI(NULL);
+			}
+		}
+	}
+}
+
+/* static */ void AI::NewEvent(CompanyID company, AIEvent *event)
+{
+	/* Clients should ignore events */
+	if (_networking && !_network_server) return;
+
+	/* Only AIs can have an event-queue */
+	if (!IsValidCompanyID(company) || IsHumanCompany(company)) return;
+
+	/* Queue the event */
+	CompanyID old_company = _current_company;
+	_current_company = company;
+	AIEventController::InsertEvent(event);
+	_current_company = old_company;
+}
+
+/* static */ void AI::BroadcastNewEvent(AIEvent *event, CompanyID skip_company)
+{
+	/* Clients should ignore events */
+	if (_networking && !_network_server) return;
+
+	/* Try to send the event to all AIs */
+	for (CompanyID c = COMPANY_FIRST; c < MAX_COMPANIES; c++) {
+		if (c != skip_company) AI::NewEvent(c, event);
+	}
+}
+
+void CcAI(bool success, TileIndex tile, uint32 p1, uint32 p2)
+{
+	AIObject::SetLastCommandRes(success);
+
+	if (!success) {
+		AIObject::SetLastError(AIError::StringToError(_error_message));
+	} else {
+		AIObject::IncreaseDoCommandCosts(AIObject::GetLastCost());
+	}
+
+	GetCompany(_current_company)->ai_instance->Continue();
+}
+
+/* static */ void AI::Save(CompanyID company)
+{
+	if (!_networking || _network_server) {
+		assert(IsValidCompanyID(company));
+		assert(GetCompany(company)->ai_instance != NULL);
+
+		CompanyID old_company = _current_company;
+		_current_company = company;
+		GetCompany(company)->ai_instance->Save();
+		_current_company = old_company;
+	} else {
+		AIInstance::SaveEmpty();
+	}
+}
+
+/* static */ void AI::Load(CompanyID company)
+{
+	if (!_networking || _network_server) {
+		assert(IsValidCompanyID(company));
+		assert(GetCompany(company)->ai_instance != NULL);
+
+		CompanyID old_company = _current_company;
+		_current_company = company;
+		GetCompany(company)->ai_instance->Load();
+		_current_company = old_company;
+	} else {
+		/* Read, but ignore, the load data */
+		AIInstance::LoadEmpty();
+	}
+}
+
+/* static */ char *AI::GetConsoleList(char *p, const char *last)
+{
+	return AI::ai_scanner->GetAIConsoleList(p, last);
+}
+
+/* static */ const AIInfoList *AI::GetInfoList()
+{
+	return AI::ai_scanner->GetAIInfoList();
+}
+
+/* static */ AIInfo *AI::GetCompanyInfo(const char *name)
+{
+	return AI::ai_scanner->FindAI(name);
+}
+
+/* static */ bool AI::ImportLibrary(const char *library, const char *class_name, int version, HSQUIRRELVM vm)
+{
+	return AI::ai_scanner->ImportLibrary(library, class_name, version, vm, GetCompany(_current_company)->ai_instance->GetController());
+}
+
+/* static */ void AI::Rescan()
+{
+	AI::ai_scanner->RescanAIDir();
+	ResetConfig();
+}