Fist of all The weapons to make you shoot under a platform are 2,8, and 0 . To know how to use them is to be under someone and aim the gun (2,8,or 0) under someone and shoot straight up but for 0 you can use it in diffrent directions The best place to practice using it is in the green place for level 2. Well im going to go look for more have fun
Quick Kills: The quickest kill thingy i found out was with number 8 all i had to do wihle i was play campaign was shoot someone 2-3 times in the head until it kept blinking BUT i found out when i was trying to shoot under it, well i shoot the feet 2-3 times and i was just standing there waiting till he died but when they exploded i guess i was to close to it and i died so WARNING: DONT DID WHAT I DID: