This report has been constructed from details from the reddit thread at

http://www.reddit.com/r/linux_gaming/comments/28199a/steams_opengl_version_info_misleading_for_aspyrs/

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Broken transparency in Civ5 (see http://i.imgur.com/z4mFZXE.jpg)

 - around oil resources
 - around the lighthouse beams
 - floodlight shining on active unit
 - smoke rising from pillaged tiles and barbarian camps

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lspci -v | grep VGA and glxinfo | grep OpenGL output:

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Pitcairn XT [Radeon HD 7870 GHz Edition]

OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD PITCAIRN
OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.3.0-devel
(git-0d89448 trusty-oibaf-ppa)
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 10.3.0-devel (git-0d89448 trusty-oibaf-ppa)
OpenGL shading language version string: 1.30