diff --git a/bookquiz/questions.php b/bookquiz/questions.php
index 0854cb4..5db1029 100644
--- a/bookquiz/questions.php
+++ b/bookquiz/questions.php
@@ -23,7 +23,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-require_once("../../../config.php");
 require_once( "../headergame.php");
 require_once("../locallib.php");
 
diff --git a/db/createsnakes.php b/db/createsnakes.php
index d3b6346..1e84cce 100644
--- a/db/createsnakes.php
+++ b/db/createsnakes.php
@@ -15,7 +15,7 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 require( "../../../config.php");
-
+require_login();
 execute_sql("truncate TABLE {game_snakes_database}");
 
 require( "importsnakes.php");
diff --git a/export.php b/export.php
index 47d630c..5a2d367 100644
--- a/export.php
+++ b/export.php
@@ -21,7 +21,8 @@
  * @package game
  **/
 
-require( '../../config.php');
+defined('MOODLE_INTERNAL') || die();
+
 ob_start();
 
 require_once( $CFG->dirroot.'/lib/formslib.php');
diff --git a/preview.php b/preview.php
index 6acaf2d..33c16e2 100644
--- a/preview.php
+++ b/preview.php
@@ -22,6 +22,9 @@
  **/
 
 require_once("../../config.php");
+
+require_login();
+
 require_once("lib.php");
 require_once("locallib.php");
 
diff --git a/report/default.php b/report/default.php
index a40d026..1d736ee 100644
--- a/report/default.php
+++ b/report/default.php
@@ -29,6 +29,8 @@
 
 // Included by ../report.php.
 
+defined('MOODLE_INTERNAL') || die();
+
 class game_default_report {
 
     public function display($cm, $course, $game) {
diff --git a/showanswers.php b/showanswers.php
index 41c3e8c..e499196 100644
--- a/showanswers.php
+++ b/showanswers.php
@@ -24,6 +24,8 @@
 require_once("../../config.php");
 require_once( "headergame.php");
 
+require_login();
+
 if (!has_capability('mod/game:viewreports', $context)) {
     print_error( get_string( 'only_teachers', 'game'));
 }
diff --git a/showattempts.php b/showattempts.php
index ab7e2bd..49bf18c 100644
--- a/showattempts.php
+++ b/showattempts.php
@@ -22,6 +22,9 @@
  **/
 
 require_once("../../config.php");
+
+require_login();
+
 require_once( "headergame.php");
 
 if (!has_capability('mod/game:viewreports', $context)) {
diff --git a/snakes/play.php b/snakes/play.php
index d1de4dc..8daaf7e 100644
--- a/snakes/play.php
+++ b/snakes/play.php
@@ -106,16 +106,17 @@ function game_snakes_play( $id, $game, $attempt, $snakes, $context) {
 <img src="<?php echo $board->imagesrc; ?>"></img>
 </div>
 
-<?php
+    <?php
     if ($finish == false) {
         game_snakes_showdice( $snakes, $board);
     }
-?>
+    ?>
+
     </td>
-	</tr>
-	</table>
-<?php
+    </tr>
+    </table>
 
+    <?php
     if ($game->bottomtext != '') {
         echo '<br>'.$game->bottomtext;
     }
@@ -138,8 +139,8 @@ height="<?php echo $pos->height; ?>"/>
 <div ID="dice" STYLE="position:relative; 
 left:<?php p( $board->width + round($board->width / 3)); ?>px;
 top:<?php p( -2 * round($board->height / 3));?>px; ">
-	<img src="snakes/1/dice<?php p($snakes->dice);?>.png" alt="<?php print_string('snakes_dice', 'game', $snakes->dice) ?>" />
-	</div>	
+    <img src="snakes/1/dice<?php p($snakes->dice);?>.png" alt="<?php print_string('snakes_dice', 'game', $snakes->dice) ?>" />
+    </div>
 <?php
 }
 
diff --git a/sudoku/create.php b/sudoku/create.php
index d797aa1..3929535 100644
--- a/sudoku/create.php
+++ b/sudoku/create.php
@@ -19,7 +19,7 @@ require_once("class.Sudoku.php");
 require( '../header.php');
 
 $action = optional_param('action', PARAM_ALPHA);   // The action.
-
+require_login();
 if ($action == 'create') {
     AppendSudokuB();
 } else {
diff --git a/sudoku/export.php b/sudoku/export.php
index 9096b6a..609fa98 100644
--- a/sudoku/export.php
+++ b/sudoku/export.php
@@ -15,6 +15,7 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 require( "../../../config.php");
+require_login();
 
 export();
 
diff --git a/translate.php b/translate.php
index 9eae5bc..12ef31b 100644
--- a/translate.php
+++ b/translate.php
@@ -21,6 +21,9 @@
  * @package game
  **/
 require( "../../config.php");
+
+require_login();
+
 require( 'locallib.php');
 
 ?>