World of Level Design Survey: Challenges
Find few minutes to fill up little survey for World of Level Design. Survey can be found here.
Art Pass Contest at TF2Maps.net
Get your hands on already prepared raw Team Fortress 2 level and show your skills by creating the environment! More information about contest can be found here. Good luck!
Art Dump from Singularity at Polycout
A lot of concept art from Singularity by Raven Software. All stuff can be found here.
How to Create a Playable Level in 11 Days
Check latest UDK Tutorials - How to Create a Playable Level in 11 Days posted on World of Level Design. You can read it here.
Dear Esther – Screenshots and video released
Robert Briscoe released few screens of his level remake called Dear Esther. More info and a video can be found here.
Creating Multiplayer Levels for Singularity
Creating Multiplayer Levels for Singularity - article written by Justin Dinges, Senior Artist from Raven Software. Read it here.
Full list from of articles from Singularity Developer's Diary can be found here.