I don't think that's a good idea to show all games
with thumbs... Instead, let me show you how to make a page containing the simple plain-text list of all games:
1. create a new dynamic (php) block ALLGAMES (see screenshot) with this code:
<?php
if( substr($cPage, 0, 8) == 'allgames' )
{
$nColumns = $cTpl["nColumnsListCat"];
$nOrder = $cB["ALLGAMES"]["sort"];
$tpl->define( "tplBList", "block_catgameslist.html" );
$tpl->assign( 'CATEGORY', '' );
for( $i=0; $i<$nColumns; $i++ )
$tpl->define_dynamic( "dynListCol$i", "tplBList" );
$tpl->assign( "LISTSORTSTR", $cSortStr[$nOrder] );
$res = $db->super_query( "SELECT id, category_id, title FROM " . $cMain["dbPrefix"] . "games ORDER BY ".$cSort[$nOrder], true );
$col=0;
foreach( $res as $game )
{
$tpl->assign( "LISTURL", GameURL($game["id"], $game["title"]) );
$tpl->assign( "LISTTITLE", $game["title"] );
$tpl->parse( "DYNLISTGAMES$col", ".dynListCol$col" );
$col++;
if( $col == $nColumns)
$col = 0;
}
$tpl->parse( "ALLGAMES", "tplBList" );
}
else
$tpl->assign( 'ALLGAMES', substr($cPage, 0, 8) );
?>
See its settings on the screenshot
2. Create a new page and name it "allgames" (the filename is important, if you want another filename, you should also change it in the 2nd line of the php code above). Menu item title and other params anot that important.
In the html code of that new page place this: !ALLGAMES!.
That's it

Demo:
http://www.arcadeous.com/docs/allgames.html