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Don't take any damage :)
Check out our blog post on the iOS release too. It includes a funny picture: http://www.crimsonland.com/blog
Try the Rush mode :)
The full game unlock gives you access to rest of the 60 quests. Completing the quests unlocks all of the weapons and perks. The Survival mode...
This is a known but so far rare bug. It might be that occurs more often on iOS, but we haven't been able to track it down yet. For the time being...
