http://www.peertopatent.org.au/patent/2008252001/activity A gaming system (10, 40, 100) is disclosed which comprises a display (44), a symbol selector (20) arranged to select a plurality of symbols (290) for display at a plurality of display positions (240) on the display, and a display modifier (25) arranged to modify the displayed symbols (290) such that after modification of the symbols the locations of the symbols in the display positions are a mirror image of the locations of the symbols before modification of the symbols. The gaming system also comprises an outcome evaluator (28) arranged to determine whether symbol combinations defined by the displayed symbols (290) after modification correspond to one or more winning outcomes. A corresponding method is also disclosed. en-us