[SAMProductions]

I think it must be like this :-

pawn Код:

Spree[killerid]++;
    Spree[playerid] = 0;
    new string[100];
    if(Spree[killerid] == 10)//Checking for 10 kills
    {
        format(string, sizeof(string), "%s is on a killing spree of %d kills. Junior Killer!", Name[killerid], Spree[killerid]);
        SendClientMessageToAll(COLOR_NAVY, string);
        SendClientMessage(killerid, COLOR_GREEN, "You are on a killing spree of 10 kills. +2 score");
        GivePlayerScore(killerid, 2);
    }
    else if(Spree[killerid] == 20)//For 20 kills
    {
        format(string, sizeof(string), "%s is on a killing spree of %d kills. Senior Killer!", Name[killerid], Spree[killerid]);
        SendClientMessageToAll(COLOR_NAVY, string);
        SendClientMessage(killerid, COLOR_GREEN, "You are on a killing spree of 20 kills. +4 score");
        GivePlayerScore(killerid, 4);
    }
    else if(Spree[killerid] == 30)//30 kills
    {
        format(string, sizeof(string), "%s is on a killing spree of %d kills. Master Killer!", Name[killerid], Spree[killerid]);
        SendClientMessageToAll(COLOR_NAVY, string);
        SendClientMessage(killerid, COLOR_GREEN, "You are on a killing spree of 30 kills. +6 score");
        GivePlayerScore(killerid, 6);
    }
    else if(Spree[killerid] == 40)//40 kills
    {
        format(string, sizeof(string), "%s is on a killing spree of %d kills. General Killer!", Name[killerid], Spree[killerid]);
        SendClientMessageToAll(COLOR_NAVY, string);
        SendClientMessage(killerid, COLOR_GREEN, "You are on a killing spree of 40 kills. +8 score");
        GivePlayerScore(killerid, 8);
    }
    else if(Spree[killerid] == 50)//50 kills
    {
        format(string, sizeof(string), "%s is on a killing spree of %d kills. Insane Killer!", Name[killerid], Spree[killerid]);
        SendClientMessageToAll(COLOR_NAVY, string);
        SendClientMessage(killerid, COLOR_GREEN, "You are on a killing spree of 50 kills. +10 score");
        GivePlayerScore(killerid, 10);
    }
    else if(Spree[killerid] == 60)//60 kills
    {
        format(string, sizeof(string), "%s is on a killing spree of %d kills. God Killer!", Name[killerid], Spree[killerid]);
        SendClientMessageToAll(COLOR_NAVY, string);
        SendClientMessage(killerid, COLOR_GREEN, "You are on a killing spree of 60 kills. +12 score");
        GivePlayerScore(killerid, 12);
    }

Give it a try