It was not until late 2001 that the Microsoft Xbox became the second console with (non-standard) USB and DVD support.
V0 did not have a built-in DVD player and instead relied on an encrypted player that was copied to a memory card from an included CD-ROM (normally, the PS2 will only execute encrypted software from its memory card, but see PS2 Independence Exploit).
The PS2 also supports PS1 memory cards (for PS1 game saves only) and controllers (the PS2's Dual Shock 2 controller is essentially a slightly upgraded PS1 Dual Shock).
Another major selling point over the Dreamcast was the PlayStation 2's ability to play DVDs, which gained it a presence in electronics stores which did not formerly sell video game consoles.
Sony also advertised heavily as well and it had the advantage of being supported by Electronic Arts.
It also has a different lens and some compatibility issues documented by Sony for earlier PS2 games.
When the PlayStation 2 launched in Japan in March 2000, Sony sold 980,000 units over the opening weekend.
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