Announced on the Resident Evil 2 Launch Party event, it's part of a special Japanese promotion starting on January 25th so you get these costumes if you buy special promotion items (for example, there will be PSN Point Cards that give you the costume for free), but be made free for everyone on March 22nd.
No exact platforms mentioned, but maybe safe to assume on all of them despite the PS4 card showing above, just that it exists and will be for special events and promotions, but then free for everyone starting March 22nd.
UPDATE:
Those on Steam are probably interested in this:
Also available on Xbox and PS4 hitting as well.
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