FUBAR hard badge, how to get it: Full speed at the beginning (don't lose time while heroes speaking, after the phrase "infected and shoot on sight", something like this, game start spawns soldiers). If you do it right you get nearly a km without soldier and a great speed for the next km. After this try to avoid the impacts (spacebar helps) and line of sights of soldiers (impacts lose speed and line of sight life). If not possible try to gunshot them with the pistol. City is a real pain (a lot of obstacles). If you get City roads all the time, then is nearly impossible to get the badge. The park/graveyard is better (if you exclude the heavy tree/tombstones areas), but highway is the best (huge roads with soldiers and military vehicles at most). If you get a lot of highways, then the badge is very possible. Just try to avoid the soldiers' line of sight and you will get easy kms on exit. The game is random generated, so the badge is possible when you don't expecting it. Good luck.
FUBAR hard badge skills needed: Full upgrades to vehicle, pistol (unlimited ammo & reloads faster + soldiers dies a lot easier than their zombie variant), driver skills, gunner skills (full pistol, medium/ good the rest), meds (vitals, especially at the last km you will be heavy attacked). Optional: A heavy weapon for helicopter (pistol isn't enough, LMG/AR or mounted weaponry seems better, I used LMG), faster tasks (sometimes maybe you need to stop in front of garages to repair damages, using the trick of building as a cover to soldiers' gunfire).
The combo area burst tower + all dodge mode (+ early wave bonus increased [extra bubbles] + basic tower damage boost [helps to do an extra damage while basic tower is just a block to their path] + area burst tower range boost [larger burst area for the burst tower] helps to get the hard badge very fast. Some levels maybe needs some adjustments like one burst tower and bonuses tower around it (first add a rate, then a range, after a damage etc) I think you will figure it when you play it. :)
For anyone which has problems to pass the levels, there is a very simple hint. Seize grounds (especially at game's start) to level 1 (zero is the water where you can't build) and expand at any place where your troops builds houses. When you get some head in strength, you can beat easy your opponents. I did it without problem until level 29 with minimum spell usage except some volcanos and apocalypse. In level 29 i used an away from two opponents logic (I expanded my base to upper right corner) and i volcano-striked my strongest enemy at his strong building areas (example in middle of 4 castles) to stop his advance. With this logic, I ruined my opponents' expand while I was slowing increasing in strength. Also if you feel sure and you have the mana, you can use armageddon (works just fine while you are stronger enough than your other opponents). I hope this helped you :)
For people having problems to get the 500k hard badge after accomplish the 500k requirement and press sumbit acts like not working. Wait for some time and you will see archivement page badge description, start raising in numbers until it gets to your submited score. I had the same problem and searching for similar issues from other people when suddenly I saw counter rising. It was an unexpected surprise than to replay the game for this badge. I hope it helps you. :)
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