My tips:
- Shoot Robert1986 (or any other team mate really) in the back whenever possible, not blatantly, just cheeky little digs in the middle of a swarm to knock his health down.
- If you see molotovs, pipebombs get them and use them as quick as possible, silly to have useful things burning a hole in your pocket.
- When a tank comes, turn in a random direction then run and don't stop running, hopefully he will go for someone else, you can live out the next few minutes in glee as you watch your team get smashed to a pulp, I recommend turning your gun on yourself when he comes for you though with a console->kill.
- Horde healthkits and pills, you and ONLY you will need them - those aren't teammates you see limping around, they're liabilities
- Map going a bit slow and boring? theres plenty of cars to shoot that will bring a horde of fun bearing death upon you all, enjoy!
- Buttons that start events are there to be pressed and its a damn race to press them, make sure you're the first!
- Seriously, shoot robert1986