Whichever enemy was hit with the grenade round is the enemy that will count as the 149'th kill, and the enemy that dies from the splash damage, will count as the 150'th kill.
Source: First hand testing using Carla on Urban Chaos. --- When facing a zombie apocalypse, don't join up with a group. Why? Because you'll end up blowing your own head off due to all the pointless drama caused within.
I've bee playing it since it came out, consider myself a good player, but for the life of me I can't get to 150 on any map. I get to 130 and time runs out. I grab the timers; melee kill most things; and counter bloodshots but can't even seem to get close enough.
Easiest to me seems to be Rooftop with Carla or Sherry's alt.Only played a few times though. I have several S ranks between Urban, Requiem, and Rooftop as well.
S yeah, it it considered easy to not?
S rank with 1.2 or 1.3 is hard when playing solo especially with characters has low firepower --- PSN: Zero4ph - PS1, PS2, PSP, PS3 120gb (500gb) PH http://www.youtube.com/watch?v=D6hHWMXddWY&feature=related - Rebuild of Evangelion