Updates to Eternity's Child have been released. The updates will be applied automatically when your Steam client is restarted. The specific changes include:
Eternity's Child- Improved controller compatibility
- Allowed configuring which controller axis can be used for moving or aiming
- Xbox360 controller bumpers can be used as buttons now
- Birds are twice as fast, and have 35% as much health
- Fixed crash when switching anti-aliasing
- Fixed possible achievements issue
- Changed the title page to fade out sooner for each level
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Source: Steam