Beta Intel® Iris™ and HD Graphics Beta Driver for Windows* 7/8/8.1 for TITANFALL* and Thief*

In an effort to keep Intel HD graphics compatible with
the latest games and applications, Intel will occasionally post a “Beta” driver
for user feedback on compatibility and performance. This beta driver provides
benefit for users playing Titan Fall and Thief Games.  We strive for
the best possible experience for users of Intel HD graphics and will greatly
appreciate you feedback for these beta drivers. Download the 32-bit or 64-bit
beta drivers to play Titan Fall and Thief 2 Games.

Link: Iris™ and HD Graphics Driver for Windows* 7/8/8.1