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with a emulator
WWF SmackDown - 1999 Best of SmackDown 2006 was released on: USA: 29 December 2006
PCSX2 is the best emulator for PS2 games it says that WWE Smackdown - Here Comes the Pain is listed as playable see the related links It will not be like playing a game on the PS2 but with computer skills and the time and effort you may be able to finish the game
WWF SmackDown - 1999 2006-01-13 was released on: USA: 13 January 2006
WWF SmackDown - 1999 2006-01-20 was released on: USA: 20 January 2006
WWF SmackDown - 1999 2006-01-27 was released on: USA: 27 January 2006
WWF SmackDown - 1999 2006-02-03 was released on: USA: 3 February 2006
WWF SmackDown - 1999 2006-02-10 was released on: USA: 10 February 2006
WWF SmackDown - 1999 2006-02-17 was released on: USA: 17 February 2006
WWF SmackDown - 1999 2006-02-24 was released on: USA: 24 February 2006
WWF SmackDown - 1999 2006-03-03 was released on: USA: 3 March 2006
WWF SmackDown - 1999 2006-03-17 was released on: USA: 17 March 2006