https://www.pcgamer.com/resident-evil-2-remakes-free-98-costumes-are-now-available/

Resident Evil 2 Remake has added free '98 versions of Leon and Claire's costumes, having first been teased back in January. They arrived yesterday, along with the free Ghost Survivors DLC. Unlike that content, though, which is added to the game in a patch, these skins have to be manually added to your Steam library before you can use them. To save you about ten seconds, here's Claire's and here's Leon's. 

While you can see Mr Kennedy's retro duds up top, below is a look at what Claire looks like in throwback form: