Tower defense games require a perfect balance. Behaviour of both the enemy and the defense towers should be logical and predictable.

This update has mainly AI changes:

• The Rocket Launcher and Big Gun prefer to target bulldozers
  
• Enemy bulldozers predict road building to help future bulldozers
  
• Level balance adjusted for modified AI
  
• Explosion animations improved in slowdown mode
  
• Alt-Tab now works properly
  
• The key F12 is no longer used, since steam uses it for screenshots
  
• Achievements can no longer be unlocked in custom levels

The current tower behavour in general:

• Enemies with sheep are targeted first
  
• Default behaviour is to target the closed enemy
  
• Lasers, gattling and flame towers will prefer faster enemies
  
• Rocket Launchers and Big Guns will prefer bulldozers

There is a lot more AI involved, but these are the general rules. Towers, for example, will also take into consideration current projectiles. Please comment when you think the AI needs tweaking. Also comment when you think a level needs rebalancing.

The achievement update has just been released. Changes in this release are:

• Achievements added
  
• The tutorial can now be skipped
  
• Glitch when building towers using mouse fixed

You current progress will be used to unlock achievements when you launch the game.

Today we did a minor balance change. Level 66 was extremely difficult to beat. It was possible, but only with a specific build order.

If there is any level that needs rebalancing, please let us know!

We are pleased to announce that as of today, Operation Sheep Defense has now been released to Mac OS X. The game supports Steam Cloud and all progress made will be synchronised cross platform.

If you notice any problems on OS X or any supported platform, let us know. Thank you for your support!