hello. my ps3 tag is chafinhog and i am currently ranked 50th out of 230 thousand people. i got to level 33 and the highest rank so far is 46th that i have seen. if you want a tip for playing by your self just stay in the middle house place claymores at the door and also set a turret. just check the door every now and then and at the beggining of each round throw a air strike into the courtyard when the enemies appear. your welcome add me if you want i will delete if i dont want you XD.