Easy "Untouchable" Achievement
To execute a "deflect kick", press the Left Mouse Button on a locked-on target after a well-timed block. The timing is loose, and can be done any time they start pulling their arm back for a punch. Repeat this move fifty times in any game mode to earn the achievement. To do this easily, choose a level that can be restarted quickly and features weak opponents that telegraph their attacks, for example Tower Challenge 1.