the key to getting really far in this game is for every weapon you buy you will need to upgrade damage and make a larger clip size reload faster is optional also highly recommended guns for helping you to win the flamethrower is great specially with 2x damage and bigger clip light machine gun with bullet horse makes it shot like 20 bullets a second and it does like 5x the damage the laser cannon is ok its not as good as everything else the auto shotgun is awsome gauss rifle is great for round 20-30 with 2x damage and clip size larger shotgun normal with the upgrade to where shotgun shoots gauss bullets that is probboly the best think you can get highly recommended if you have enough money the grenade launcher is awsome 2x damage and clip size and the upgrade to where it shoots 3 grenades at once it is awsome turret guns are also good if your trying to get a survivor its good to put one where you are trying to get the survivor and always make sure you have atleast one health pack ready to go these tricks will help i figured them out myself and i was the third best player of the day that day with a score of 492000 either this or it was 420,000,000 ~so there are some tips hope you can get far now ~good luck