Tekken 6

[[Unknown]]

That's probably an issue with your physical keyboard. Believe it or not, keyboards (based on how they are wired) typically can't tell what keys you are pressing when you press too many at once that are on the same paths. In normal typing, this isn't an issue.

You can map another key also to each of the buttons, so that pressing e.g. "6" presses 1+2+3 all at once.

Alternatively, you can use a controller / gamepad. Such devices typically don't have this problem (in part because they usually don't have 100+ keys.)

http://blog.controlspace.org/2010/08/n-k...ow-to.html
(there's a test where you can even experience the issue in your web browser.)

-[Unknown]