Not through official means. Sony’s code redemption servers reject expired codes permanently. The only workaround is CFW-based installation of the DLC files directly.
Because Tales of Xillia features two distinct storylines—one following Jude Mathis and one following Milla Maxwell—some DLC was tailored specifically to the chosen route. bljs10250 dlc
The Japanese version initially launched without three major characters, who were later added as paid DLC: Not through official means
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