diff --git a/app/controllers/SeminaryController.inc b/app/controllers/SeminaryController.inc
index 7574d455..8b722e33 100644
--- a/app/controllers/SeminaryController.inc
+++ b/app/controllers/SeminaryController.inc
@@ -93,7 +93,8 @@
 			$this->checkPermission($request, $response);
 			
 			// Check achievements
-			$this->checkAchievements($request, $response);
+			$this->checkAchievements($request, $response, 'date');
+			$this->checkAchievements($request, $response, 'achievement');
 			
 			// Set Seminary and Character data
 			$this->set('loggedSeminary', self::$seminary);
@@ -148,7 +149,7 @@
 		/**
 		 * Check for newly achieved Achievements.
 		 */
-		private function checkAchievements(\nre\core\Request $request, \nre\core\Response $response)
+		protected function checkAchievements(\nre\core\Request $request, \nre\core\Response $response, $checkConditions=null)
 		{
 			// Do not check MediaController
 			if($this->request->getParam(0, 'toplevel') != \nre\configs\AppConfig::$defaults['toplevel']) {
@@ -160,6 +161,11 @@
 				return;
 			}
 			
+			// Set conditions to check
+			if(!is_null($checkConditions) && !is_array($checkConditions)) {
+				$checkConditions = array($checkConditions);
+			}
+			
 			// Get unachieved Achievments
 			$achievements = $this->Achievements->getUnachhievedAchievementsForCharacter(self::$seminary['id'], self::$character['id']);
 			if(in_array('user', self::$character['characterroles'])) {
@@ -169,6 +175,11 @@
 			// Check conditions
 			foreach($achievements as &$achievement)
 			{
+				// Check condition to test
+				if(!is_null($checkConditions) && !in_array($achievement['condition'], $checkConditions)) {
+					continue;
+				}
+				
 				// Check deadline
 				if(!is_null($achievement['deadline']) && $achievement['deadline'] < date('Y-m-d H:i:s')) {
 					continue;
diff --git a/controllers/QuestgroupsController.inc b/controllers/QuestgroupsController.inc
index 3d24a678..8eb03d38 100644
--- a/controllers/QuestgroupsController.inc
+++ b/controllers/QuestgroupsController.inc
@@ -73,10 +73,14 @@
 			// Check permission
 			if(count(array_intersect(array('admin','moderator'), SeminaryController::$character['characterroles'])) == 0)
 			{
-				$previousQuestgroup = $this->Questgroups->getPreviousQuestgroup($questgroup['id']);
-				if(!is_null($previousQuestgroup)) {
-					if(!$this->Questgroups->hasCharacterSolvedQuestgroup($previousQuestgroup['id'], $character['id'])) {
-						throw new \nre\exceptions\AccessDeniedException();
+				// Only check permissions if Character has not entered Quest before
+				if(!$this->Questgroups->hasCharacterEnteredQuestgroup($questgroup['id'], $character['id']))
+				{
+					$previousQuestgroup = $this->Questgroups->getPreviousQuestgroup($questgroup['id']);
+					if(!is_null($previousQuestgroup)) {
+						if(!$this->Questgroups->hasCharacterSolvedQuestgroup($previousQuestgroup['id'], $character['id'])) {
+							throw new \nre\exceptions\AccessDeniedException();
+						}
 					}
 				}
 			}
diff --git a/controllers/QuestsController.inc b/controllers/QuestsController.inc
index 2d7fda45..c506219b 100644
--- a/controllers/QuestsController.inc
+++ b/controllers/QuestsController.inc
@@ -53,6 +53,21 @@
 		
 		
 		
+		/**
+		 * Prefilter that is executed before running the Controller.
+		 * 
+		 * @param	Request		$request	Current request
+		 * @param	Response	$response	Current response
+		 */
+		public function preFilter(\nre\core\Request $request, \nre\core\Response $response)
+		{
+			parent::preFilter($request, $response);
+			
+			$this->checkAchievements($request, $response, array('character', 'quest'));
+			$this->checkAchievements($request, $response, 'achievement');
+		}
+		
+		
 		/**
 		 * Action: index.
 		 * 
diff --git a/models/QuestgroupsModel.inc b/models/QuestgroupsModel.inc
index b95389c0..111fd967 100644
--- a/models/QuestgroupsModel.inc
+++ b/models/QuestgroupsModel.inc
@@ -318,8 +318,7 @@
 		
 		
 		/**
-		 * Determine if the given Character has solved the Quests form
-		 * this Questgroup.
+		 * Determine if the given Character has solved a Questgroup.
 		 * 
 		 * @param	int	$questgroupId	ID of Questgroup to check
 		 * @param	int	$characterId	ID of Character to check
@@ -330,39 +329,20 @@
 			// Get data of Questgroup
 			$questgroup = $this->getQuestgroupById($questgroupId);
 			
-			// Chack all Quests
-			$currentQuest = $this->Quests->getFirstQuestOfQuestgroup($questgroup['id']);
-			if(!is_null($currentQuest))
+			// Check last Quest(s)
+			$solvedLastQuest = false;
+			$lastQuests = $this->Quests->getLastQuestsOfQuestgroup($questgroup['id']);
+			foreach($lastQuests as &$lastQuest)
 			{
-				if(!$this->Quests->hasCharacterSolvedQuest($currentQuest['id'], $characterId)) {
-					return false;
-				}
-				
-				// Get next Quests
-				$nextQuests = !is_null($currentQuest) ? $this->Quests->getNextQuests($currentQuest['id']) : null;
-				while(!is_null($currentQuest) && !empty($nextQuests))
+				if($this->Quests->hasCharacterSolvedQuest($lastQuest['id'], $characterId))
 				{
-					// Get choosed Quest
-					$currentQuest = null;
-					foreach($nextQuests as &$nextQuest) {
-						if($this->Quests->hasCharacterEnteredQuest($nextQuest['id'], $characterId)) {
-							$currentQuest = $nextQuest;
-						}
-					}
-					
-					// Check Quest
-					if(is_null($currentQuest)) {
-						return false;
-					}
-					
-					// Check status
-					if(!$this->Quests->hasCharacterSolvedQuest($currentQuest['id'], $characterId)) {
-						return false;
-					}
-					
-					$nextQuests = !is_null($currentQuest) ? $this->Quests->getNextQuests($currentQuest['id']) : null;
+					$solvedLastQuest = true;
+					break;
 				}
 			}
+			if(!$solvedLastQuest) {
+				return false;
+			}
 			
 			// Check all child Questgroups
 			$questgroup['hierarchy'] = $this->Questgroupshierarchy->getHierarchyForQuestgroup($questgroup['id']);
diff --git a/models/QuestsModel.inc b/models/QuestsModel.inc
index f7141efc..d87deff9 100644
--- a/models/QuestsModel.inc
+++ b/models/QuestsModel.inc
@@ -137,6 +137,29 @@
 		}
 		
 		
+		/**
+		 * Get all Quests a Qusetgroup that do not have a following
+		 * Quest.
+		 * 
+		 * @param	int	$questId	ID of Questgroup
+		 * @return	array			List of last Quests
+		 */
+		public function getLastQuestsOfQuestgroup($questgroupId)
+		{
+			return $this->db->query(
+				'SELECT id, questtype_id, title, url, xps, task '.
+				'FROM quests '.
+				'WHERE questgroup_id = ? AND NOT EXISTS ('.
+					'SELECT quest_id '.
+					'FROM quests_previousquests '.
+					'WHERE quests_previousquests.previous_quest_id = quests.id'.
+				')',
+				'i',
+				$questgroupId
+			);
+		}
+		
+		
 		/**
 		 * Get Quests that follow-up a Quest.
 		 *