anti -12, reach 12

[vdegenne]

there is this achievement popping on the title screen and it translates from japanese to english to "anti -12, reach 12",
I'm confused :O what's that

[malogoss]

Pretty sure what you saw is not an achievement, it's an unlock condition for a joker you have not unlocked yet.

I just checked the unlock conditions for all jokers, it looks like the only one that involves the number 12 is :

Win a run in 12 or fewer rounds.
In other words, win a run by beating no more than 12 blinds in total. Or skip at least 12 blinds and win, which is the same thing.

The joker it unlocks is "Merry Andy", an uncommon joker that has the following effects:
+3 discard. -1 hand size.

If you have already unlocked that joker, then I have no idea what you saw.

[vdegenne]

No you are right, it's the unlock condition (which luckily have its steam achievement too) for winning the run in 12 or fewer rounds, hence the "-12 12" in the Japanese description, which can be confusing if you have no idea that achievement exist.

Thanks for your help kind sir

[Knowsome]

There is an achievement for reaching ante 12, which is the 12th round on endless mode after beating the 8th ante (8th round)
.