The original Playstation may not seem like the first place to go for reverbs, but a clever person called Shirobon has managed to capture some IRs from the consoles on board FX. You can get his IRs for free from his bandcamp page - which is heavily referenced in the video above. They have a very digital and lo fi quality, but perfect for that 90s ambinece. Check the video description for some great IR references too!
GPU Audio recently released a free pack of 50 Impulse Responses. Get them here: https://sonicstate.com/news/2023/03/31/free-impulse-response-pack-/
About the author [midierror]: midierror makes nifty Max For Live devices, innovative music hardware, award winning sample packs and hosts a podcast speaking to people in the music world.