Cycles isn't appearing in render engine drop down list I just upgraded to 2.75 and there isn't an option for cycles render in the engine drop down.  How do I access cycles render in the new environment?  It only list, blender render and blender game.
First thing to check is in the Addons tab in the User Preferences:


  User Preferences > Addons > Render: Cycles Render Engine.


My best first guess is that the box for this option is unchecked.