Just got my first gold stake win, but the Steam achievement didn't unlock for me.

[calm bobcat]

The run was unneeded and I didn't have any mods activated.

Just got my first gold stake win, but the Steam achievement didn't unlock for me.

[rapid mist]

you say that you didn't have any mods activated, are you implying that you have steamodded installed and just have all the mods disabled?

because if so, that's your issue. steamodded disables achievements