TOWER STACK LION™ stands tall in a new series with 16 vertical reel positions and 4 progressive levels. Players can select to play up to 3 frames totaling 150 pay lines. Playing the PLUS FACTOR ante bet adds an extra selectable play area according to reel angle, increases the number of wild on reel 5 and enables the jackpot challenge feature containing bonus credit prizes and 4 progressive levels. 

• During PLUS FACTOR play, PILE’EM UP JACKPOT CHALLENGE may be triggered 
• Each of the 3 frames can be moved within the applicable play area
• BIG CAT FEATURE consists of a mini game and 8 free games