Accomplish the indicated achievement to get the corresponding 
number of Gamerscore points:

A Comfortable Pace (10 points): Clear mission 11 in Human mode
Easy Does It (10 points): Clear all missions in Human mode
Half Way There (10 points): Clear mission 11 in Devil Hunter mode
Done and Done (20 points): Clear all missions in Devil Hunter mode
The Best of the Rest (20 points): Clear all missions in Human mode with an S 
ranking
A Cut Above (30 points): Clear all missions in Devil Hunter Mode with an S 
ranking
Smokin'! (10 points): Complete a Stylish Rank S (Smokin'!) combo
Smokin' Style!! (10 points): Complete a Stylish Rank SS (Smokin' Style!!) combo
Smokin' Sick Style!!! (10 points): Complete a Stylish Rank SSS (Smokin' Sick 
Style!!!) combo
Simply Spectacular (10 points): Complete a mission with an S ranking
River of Red (10 points): Acquire 10,000 Red Orbs
Filled with Pride (10 points): Acquire 10,000 Proud Souls
Rookie Devil Hunter (10 points): Defeat a total of 100 enemies