Steam achievements are here!!

Not all achievements have icons yet. That will be a side project @w@ Any achievements you have unlocked in-game should unlock related Steam achievements when launching. Steam achievements are additive and will not lock again if save data is erased. 1.9.9 also fixes: [list] [*] It was impossible to get the campaign clear achievements, as it expected you to clear a stage that doesn't exist yet. [*] An issue with case-sensitive filesystems made one unlockable track unplayable. [*] The game will now pause when going to the Steam overlay. [*] macOS Steam depots have now been enabled. [/list] There is an issue where unpausing after viewing the Steam overlay may trigger the pause dialog a second time. I'm trying to understand why it does this.