offered backward-compatibility for its predecessor's DualShock controller, as well as its games. The PS2 is the best-selling video game console of all time, having sold over 155 million units worldwide, as confirmed by Sony. I personally am a sceptic as over its life I owned 3 ps2 consoles this was due to the poor performance causing breakdowns once outside warranty. PS2 hardware consists of the original ps2 console followed by the slim and then the super slim. There were various colours released and game packs/limited edition variant boxes.