• Monster World IV
• Twinkle Tail
• If Tomb Raider is old enough for you
• Contra
• Touho
• another game I played (forgot the name, will edit later)
• most games where you could choose between 2 or more playable characters

Now that I think of it, the only not oversexualised female protagonists in retro games (I can think of rn) are from japanese titles. The USSR didn't import video games and Europe and the US were just too conservative ig.

undertale

ddlc

katawa shoujo

little misfortune

hellblade: senua's sacrifice

parasite eve

depending on "old" but horizon zero dawn

like a dragon 5 (Haruka is a protag)