To perform a powerful combo, get Rorschach's knockdown ability, area attack, and fast area attack. Then, press Heavy, Light, Light, Heavy, Heavy, Heavy.
ACHIEVEMENT - HOW TO UNLOCK Psycho (36 points) - Beat in Rorschach mode. Hero (36 points) - Beat in Nite Owl mode. Teamwork (36 points) - Beat in co-op mode. Thief (15 points) - Find all abilities and pickups in Rorschach mode. Detective (15 points) - Find all abilities and pickups in Nite Owl mode. Untouchable (11 points) - Go unharmed for an entire level, without restarting from a checkpoint. Turbo (11 points) - Beat in less than 80 minutes in one session, without restarting from a checkpoint. Vigilante (8 points) - Eliminate 20 bad guys in 101 seconds. Shield (8 points) - Dodge or block 25 incoming attacks. Strong Arm (8 points) - Knock 100 people over, by throwing other people into them. Retaliator (8 points) - Perform 200 counter attacks. Exterminator (8 points) - Perform 250 finishing moves.