"Plague Inc: Evolved is a unique mix of high strategy and terrifyingly realistic simulation. Your pathogen has just infected 'Patient Zero' - now you must bring about the end of human history by evolving a deadly, global Plague whilst adapting against everything humanity can do to defend itself."

v0.8.4 changelog:
Scenario Creator
New Additions:
- Added all disease types to Disease Lab, including Neurax, Necroa and Simian!
- Added Government Actions Lab
Tweaks:
- General text and layout improvements.
Fixes
- Published "Friends-only" string size
- Colombia put in correct alphabetical order in starting country list.
- Reload of edited sea routes bug fixed
Main Game
New Additions:
- Major gameplay update to core disease types following player feedback, particularly Parasite, Prion and the Neurax Worm
- Upgraded human AI, making life more difficult for any potential world-ending pathogen
- Added new languages: Turkish, Japanese, Norwegian & Polish.
- Tooltip overhaul throughout the game. Improved text, positioning and dynamic data, such as showing boat routes.
Tweaks:
- Moved Necroa/Prion position in game so Prion comes before Necroa.
- Cheat Unlocks: First four cheats are unlocked by beating all diseases on Normal. The final two still require mega-brutal.
- Country populations updated.
- Optimized saved game file; texture data is now stored locally while save data continues to be on both cloud and locally.
- "New" tab for recently played Custom Scenarios added.
- Upgraded custom scenarios navigation including search and filter functions.
- Improved local caching and loading of custom scenarios.
- Loading bar added for custom scenarios.
- Improved refresh of star ratings in custom scenarios
- New save/load system for custom scenarios.
- Polishes to graph system.
- Credits updated - including community translatiors.
- General text improvements.

For the full changelog, view changelog.txt.

If you like the game, support the developer, buy it.   
http://store.steampowered.com/app/246620