Para que fique bem ajustado o seu jogo à largura da sua postagem modifique os números de WIDTH"Largura" ---e---HEIGHT"Altura"
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<iframe frameborder="0" height="420" scrolling="no" src="http://www.freeonlinegames.com/embed.php?g_id=15024" width="550"></iframe>
<iframe frameborder="0" height="500" scrolling="no" src="http://www.freeonlinegames.com/embed.php?g_id=15208"
width="640"></iframe>
<iframe frameborder="0" height="450" scrolling="no" src="http://www.freeonlinegames.com/embed.php?g_id=154"
width="600"></iframe>
<iframe width="300" height="400" src="http://www.freeonlinegames.com/embed.php?g_id=295" frameborder="0" scrolling="no"></iframe>
<iframe width="600" height="450" src="http://www.freeonlinegames.com/embed.php?g_id=14927" frameborder="0" scrolling="no"></iframe>
<iframe width="600" height="450" src="http://www.freeonlinegames.com/embed.php?g_id=3315" frameborder="0" scrolling="no"></iframe>
<iframe width="550" height="400" src="http://www.freeonlinegames.com/embed.php?g_id=816" frameborder="0" scrolling="no"></iframe>
<iframe width="600" height="323" src="http://www.freeonlinegames.com/embed.php?g_id=15559" frameborder="0" scrolling="no"></iframe>
<iframe width="550" height="400" src="http://www.freeonlinegames.com/embed.php?g_id=14357" frameborder="0" scrolling="no"></iframe>
<iframe width="600" height="450" src="http://www.freeonlinegames.com/embed.php?g_id=3081" frameborder="0" scrolling="no"></iframe>
<iframe width="360" height="400" src="http://www.freeonlinegames.com/embed.php?g_id=3145" frameborder="0" scrolling="no"></iframe>
<iframe width="550" height="400" src="http://www.freeonlinegames.com/embed.php?g_id=10335" frameborder="0" scrolling="no"></iframe>
<iframe width="520" height="390" src="http://www.freeonlinegames.com/embed.php?g_id=3222" frameborder="0" scrolling="no"></iframe>