My Quest to Find a True-to-80s Synthwave Game Soundtrack for My Retro Project

I'm working on a small indie game that’s set in an alternate 1980s universe, and I want the soundtrack to really capture that authentic synthwave vibe without sounding too polished or modern. I've tried using popular synthwave packs from online stores, but they all feel a bit too clean and digital - not gritty enough. I even experimented with some vintage synth plugins on my DAW, but without the right effects and layering, it still didn’t hit that raw nostalgic feeling I’m after. My goal is a soundtrack that feels like it was ripped straight from an old VHS tape, with warmth, tape hiss, and those classic synth textures that defined the decade. I’m curious if anyone here has experience creating or sourcing truly authentic 80s-style synth music for games or other projects? Also, are there any lesser-known synth plugins or hardware emulators you'd recommend that can help nail that analog warmth? Bonus points if you’ve got tips on mixing techniques or effects that add that lo-fi 80s flavor without making the music sound muddy or amateurish. What’s your go-to approach for making synthwave sound genuinely retro rather than just '80s-inspired'?