diff --git a/cross/cross_class.php b/cross/cross_class.php
index faddfd6..e3b0f24 100644
--- a/cross/cross_class.php
+++ b/cross/cross_class.php
@@ -565,7 +565,7 @@ class Cross
     }
 
     /**
-     * Scans a positions.
+     * Scans a position.
      *
      * @param int $pos
      * @param int $dir
@@ -576,7 +576,7 @@ class Cross
      * @param object $poss
      * @param int $crosspos
      * @param int $crossdir
-     * @param object $crosssword
+     * @param object $crossword
      * @param int $n20
      *
      * @return true if it is ok.
diff --git a/cryptex/play.php b/cryptex/play.php
index 122ee98..789c95c 100644
--- a/cryptex/play.php
+++ b/cryptex/play.php
@@ -173,7 +173,7 @@ function game_cryptex_check( $id, $game, $attempt, $cryptexrec, $q, $answer, $fi
  * @param stdClass $game
  * @param stdClass $attempt
  * @param stdClass $cryptexrec
- * @param stdClass $crosssm
+ * @param stdClass $crossm
  * @param boolean $updateattempt
  * @param boolean $onlyshow
  * @param boolean $showsolution
diff --git a/hiddenpicture/play.php b/hiddenpicture/play.php
index 2c9a6e4..2cb828a 100644
--- a/hiddenpicture/play.php
+++ b/hiddenpicture/play.php
@@ -303,6 +303,8 @@ function game_hidden_picture_computescore( $game, $hiddenpicture) {
  * @param stdClass $attempt
  * @param stdClass $hiddenpicture
  * @param boolean $showsolution
+ * @param int $offsetquestions
+ * @param int $correctquestions
  */
 function game_hiddenpicture_showhiddenpicture( $id, $game, $attempt, $hiddenpicture, $showsolution,
             $offsetquestions, $correctquestions) {
diff --git a/snakes/createboard.php b/snakes/createboard.php
index e0b3a05..1714250 100644
--- a/snakes/createboard.php
+++ b/snakes/createboard.php
@@ -120,6 +120,7 @@ function computexy( $pos, &$x, &$y, $colsx, $colsy) {
  * Make board
  *
  * @param object $im
+ * @param int $dir
  * @param int $cs
  * @param int $cy
  * @param object $board
diff --git a/sudoku/class.Sudoku.php b/sudoku/class.Sudoku.php
index a69b139..6793d45 100644
--- a/sudoku/class.Sudoku.php
+++ b/sudoku/class.Sudoku.php
@@ -101,7 +101,7 @@ class objects {
         return (count($xxx) == 0);
     }
 
-    /*
+    /**
      * Deep copy anything.
      *
      * @param array $thearray [optional] Something to be deep copied.  Default is the current
@@ -117,16 +117,6 @@ class objects {
             return unserialize(serialize($thearray));
         }
     }
-
-    /**
-     * Debugging output interface.
-     *
-     * @param mixed $theValue The "thing" to be pretty printed.
-     * @param boolean $theHTMLFlag True if the output will be seen in a browser, false otherwise.
-     */
-    public function print_d(&$thevalue, $thehtmlflag = true) {
-        print SDD::dump($thevalue, $thehtmlflag);
-    }
 }
 
 /**
@@ -1816,6 +1806,12 @@ class sudoku extends ObjectS {
  */
 class SudokuTemplates extends Sudoku
 {
+    /**
+     * Generate puzzle from file
+     *
+     * @param int $thehandle
+     * @param int $thedifficultylevel
+     */
     public function generatepuzzlefromfile($thehandle = STDIN, $thedifficultylevel = 10) {
         $yyy = array();
 
@@ -1832,6 +1828,12 @@ class SudokuTemplates extends Sudoku
         return $this->generatepuzzlefromarray($yyy, $thedifficultylevel);
     }
 
+    /**
+     * Generate puzzle from file
+     *
+     * @param int $thearray
+     * @param int $thedifficultylevel
+     */
     public function generatepuzzlefromarray($thearray, $thedifficultylevel = 10) {
         $this->_generatepuzzle($thearray, array(), array());
 
@@ -1857,10 +1859,19 @@ class SudokuTemplates extends Sudoku
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class sudokuintermediatesolution extends sudoku {
+    /**
+     * intermediate results
+     *
+     * @param int $thedebug
+     */
     public function sudokuintermediateresults($thedebug = false) {
         $this->sudoku($thedebug);
     }
-
+    /**
+     * print intermediate solution
+     *
+     * @param object $theheader
+     */
     protected function _printintermediatesolution($theheader = null) {
         $this->printsolution($theheader);
     }
diff --git a/sudoku/create.php b/sudoku/create.php
index e29203a..fb3ffdc 100644
--- a/sudoku/create.php
+++ b/sudoku/create.php
@@ -129,9 +129,9 @@ function packsudoku( $si, $sp) {
 /**
  * Creates a sudoku
  *
- * @param $id
- * @param $sp
- * @param $level
+ * @param int $id
+ * @param object $sp
+ * @param int $level
  *
  * @return true if created correctly
  */
@@ -157,7 +157,7 @@ function create( &$si, &$sp, $level=1) {
 /**
  * get opened
  *
- * @param $si
+ * @param stdClass $si
  *
  * @return count of opened
  */
diff --git a/sudoku/play.php b/sudoku/play.php
index a8de7e6..8cc3ee0 100644
--- a/sudoku/play.php
+++ b/sudoku/play.php
@@ -423,6 +423,10 @@ function game_sudoku_getglossaryentries( $game, $offsetentries, &$entrylist, $nu
  * @param stdClass $sudoku
  * @param int $offsetquestions
  * @param string $numbers
+ * @param int $correctquestions
+ * @param boolean $onlyshow
+ * @param boolean $showsolution
+ * @param stdClass $context
  */
 function game_sudoku_showquestions_quiz( $id, $game, $attempt, $sudoku, $offsetquestions, $numbers,
      $correctquestions, $onlyshow, $showsolution, $context) {
@@ -502,6 +506,9 @@ function game_sudoku_showquestions_quiz( $id, $game, $attempt, $sudoku, $offsetq
  * @param stdClass $sudoku
  * @param int $offsetentries
  * @param int $numbers
+ * @param int $correctentries
+ * @param boolean $onlyshow
+ * @param boolean $showsolution
  */
 function game_sudoku_showquestions_glossary( $id, $game, $attempt, $sudoku, $offsetentries, $numbers,
  $correctentries, $onlyshow, $showsolution) {
@@ -714,12 +721,12 @@ function game_sudoku_check_glossaryentries( $id, $game, $attempt, $sudoku, $fini
 /**
  * This is the last function after submiting the answers.
  *
- * @param $id
- * @param $game
- * @param $attempt
- * @param $sudoku
- * @param $finishattempt
- * @param $course
+ * @param int $id
+ * @param stdClass $game
+ * @param stdClass $attempt
+ * @param stdClass $sudoku
+ * @param boolean $finishattempt
+ * @param stdClass $course
  */
 function game_sudoku_check_last( $id, $game, $attempt, $sudoku, $finishattempt, $course) {
     global $CFG, $DB;
diff --git a/sudoku/sdd/class.SDD.php b/sudoku/sdd/class.SDD.php
index 0cb6a6f..9a6c6d4 100644
--- a/sudoku/sdd/class.SDD.php
+++ b/sudoku/sdd/class.SDD.php
@@ -15,27 +15,26 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
- * Dump structured data, i.e., Objects and Arrays, in either plain text or
- * html.  This is a class wrapper for a couple of utility routines that I use
+ * Dump structured data, i.e., Objects and Arrays, in either plain text or html.
+ * 
+ * This is a class wrapper for a couple of utility routines that I use
  * all the time.  It's handier to have them as a class.
  *
- * @author Dick Munroe <munroe@csworks.com>
+ * @author Dick Munroe <munroe@csworks.com> original package StructuredDataDumper
  * @copyright copyright @ by Dick Munroe, 2004
  * @license http://opensource.org/licenses/gpl-license.php GNU Public License
- * @package StructuredDataDumper
+ * @package mod_game
  */
 
 defined('MOODLE_INTERNAL') || die();
 
 /**
- * Dump structured data, i.e., Objects and Arrays, in either plain text or
- * html.  This is a class wrapper for a couple of utility routines that I use
- * all the time.  It's handier to have them as a class.
+ * This is a class wrapper for a couple of utility routines that I use all the time.
  *
  * @author Dick Munroe <munroe@csworks.com>
  * @copyright copyright @ by Dick Munroe, 2004
  * @license http://opensource.org/licenses/gpl-license.php GNU Public License
- * @package StructuredDataDumper
+ * @package mod_game
  */
 class sdd {
     /** @var HTML to be generated flag. */
@@ -44,7 +43,7 @@ class sdd {
     /**
      * Constructor.
      *
-     * @param boolean $theHTMLFlag [optional] True if HTML is to be generated.
+     * @param boolean $thehtmlflag [optional] True if HTML is to be generated.
      *                If omitted, $_SERVER is used to "guess" the state of
      *                    the HTML flag.  Be default, HTML is generated when
      *                    accessed by a web server.
@@ -60,7 +59,6 @@ class sdd {
     /**
      * Dump a structured variable.
      *
-     * @static
      * @param mixed $thevariable the variable to be dumped.
      * @param boolean $thehtmlflag [optional] true if HTML is to be generated,
      *                false if plain text is to be generated, null (default) if
@@ -95,9 +93,9 @@ class sdd {
      * Dump the contents of an array.
      *
      * @param array $thearray the array whose contents are to be displayed.
-     * @param boolean $theHTMLFlag True if an HTML table is to be generated,
+     * @param boolean $thehtmlflag True if an HTML table is to be generated,
      *                false otherwise.
-     * @param string $theIndent [optional] Used by SDD::dArray during recursion
+     * @param string $theindent [optional] Used by SDD::dArray during recursion
      *               to get indenting right.
      * @return string The display form of the array.
      */
@@ -147,8 +145,8 @@ class sdd {
      * the object is displayed from most derived to the base
      * class, in order.
      *
-     * @param object $theObject the object to be dumped.
-     * @param boolean $theHTMLFlag true if HTML is to be generated.
+     * @param object $theobject the object to be dumped.
+     * @param boolean $thehtmlflag true if HTML is to be generated.
      * @return string the display form of the object.
      */
     public function dobject(&$theobject, $thehtmlflag) {
@@ -259,8 +257,8 @@ class sdd {
     /**
      * Generate context specific new line equivalents.
      *
-     * @param integer [optional] the number of newlines.
-     * @param boolean [optional] true if generating html newlines.
+     * @param integer $thecount [optional] the number of newlines.
+     * @param boolean $thehtmlflag [optional] true if generating html newlines.
      *
      * @return string newlines.
      */
@@ -287,8 +285,8 @@ class sdd {
     /**
      * Dump any scalar value
      *
-     * @param mixed $theVariable the variable to be dumped.
-     * @param boolean $theHtmlFlag true if html is to be generated.
+     * @param mixed $thevariable the variable to be dumped.
+     * @param boolean $thehtmlflag true if html is to be generated.
      */
     public function scalar(&$thevariable, $thehtmlflag) {
         if ($thehtmlflag) {