the rules state the achievement must be visible when u get it but how do u make steam show u an achievement that you already have? sounds like u only have one attempt at this

https://github.com/gibbed/SteamAchievementManager you can use SAM (easiest solution) or make an alternate steam account and family share the game to it. https://discord.com/invite/speedsouls You can join the Speedsouls Discord server if you have any further questions.