1. jump to go faster if you are out of auxilary power. 2. if you don't know yet, the spinner machine in ravenholm can be picked up and thrown at zombies used like a saw blade. 3. for slow zombies, or regular ones, if you don't like them then close a door behind them or hide behind a gate. 4. fast zombies are easily killed with grenades or a shotgun. 5. the most efficient weapon to use at medium and close combat is the shotgun. 6. when driving, do not go over jumps or cliffs to high because your weight in the front will make it do a front flip. 7. a good way to keep the g-man in sight at some places like the old red barn and the captain cubbage house, stay well far away and look at him with your scope. 8. to reach high places, throw a grenade under you or blast your way up with a grenade launcher, or known as the mp-5. 9. to cheat the ai in the lower level, (1st level) at the rooftops. let them see you then hide. when they run to the middle of the road, they will get ran over by an armored vehicle. 10. to get past the part on highway level, where you have to find these little rectangular generators to open the gate. instead, for fun, push a car by a lower part of the gate and find the two metal ramps. put them on the car, then back up in the buggy then turbo it, and let er fly. (try to get over the gate) 11. to get past the part in ravenholm with the neverending zombies, run to the little shed that is 2 stories tall. go behind it and then go up the stairs, pull the lever. jump down and go into the ally at the end of the road, jump up the two boxes. keep jumping from roof to roof until you get to a platform that has a door with light shining out of it. 12. cheats are gay 13. uhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh 14. o_o o_0