The mobile version has many levels that use capabilities of a phone like tilting the device. (so make sure you check the free mobile version too, there is also something else inside at the end...)
After forever I finally get impossible finishing off the Unity badges.
Only tip is on the smallest rings you go round twice so you have some time to see what is coming. Otherwise practice practice practice. Drunk was a lot easier to complete after I had done 80+ on Normal Endless.
After nearly 5 years of trying I finally succeed at hard badge.
For final level I used Ability; static field, items; adrenaline boost, power extender, extra clips, weapons; m9, magnum, terminator, assault bouncer, holy grail, destroyer, rocket launcher. Just focus on rocket launcher and rapid fire/X2 damage/invincibility.
White runners is not that bad after you have unlocked Khouri and Gryphon. I use Thalia as Tank with those 2 behind and that works to keep all white runners at bay whilst I instant kill to the end.
For Easy/Medium badge just upgrade main weapon damage and armor piercing. Should manage to do all levels and potentially 5 star them.
For Hard badge follow this video http://www.youtube.com/watch?v=ChFDt_7dDD4. Basically you need to upgrade items 1/7 and also purchase 4/5. See video for location ideas on where to place the items.
Easy badge earned - May 7 2014
1st Hard Badge earned - May 9 2014
2nd Hard Badge earned - May 19 2016
Glad it is finally over. For FUBAR mode, just max perks/car/last weapon on Diana. 5 steroids and 5 health kits. Use health kits when red flashing, remember that you heal when you go onto or off the highway. Use steroids when car starts smoking and when at a garage. I didn't need to rebuild my car when I got badge or get more ammo, don't shoot unless at bombs on floor or zombies on hood.
Follow top comment for medium badge. 15 HQ, 20 Mine, 5 Tavern. Then a upgrade the fastest ending building. Remember t bother attacking other bases it is pointless you get enough silver from quests. Remember to get 5 researchers and focus on HQ 1st until you reach the 6hr ones then go silver mine although not really required.
(Medium Badge is Broken)
With changing the battle rating calculator you now earn medium badge before easy. So just follow introduction and then complete the first 5 levels or so and both badges are yours easily.
(Medium Badge Speedrun)
Unlock Popo and 2nd unit. Then Lillith and 2nd unit. Then unlock 2/3 spells on all 3 characters. Now upgrade damage boost skill and burn skill on Lillith and just keep upgrading them. If you want you can upgrade items but I didn't bother. Just do fast forward + auto attack and then spam the skills to get easy victory all the way to the end. No grinding required.
Why are people grinding in this game? I easily managed every level 1st try with 3-stars. Try using ice tree with the beginning spell in unholy and fire.
Ok so a way to prevent the grind people are complaining about you can use crystals to craft comm/uncommon items. These items are ridiculously overpowering compared to what you can get at the start, this makes money pretty much obsolete.
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The mobile version has many levels that use capabilities of a phone like tilting the device. (so make sure you check the free mobile version too, there is also something else inside at the end...)