Whats the name of this game?

theres this game i want to play again but i forgot what its called. its an online free shooting game thats free. i remember there was like a log in and you fight with people. its was 3d and kinda like black ops. there were these thing u have to stand by til they get to 100 and u get a pont or something. i remember u get items based on how many kills u get and i think i remember the lvl 9 was called roller. every day u dont go on u lose 1 lvl i think it was. u had to download it but does anyone know what this game is called?