Counter-Strike: Source 2004 beta - de_dust
de_dust is one of two levels available in the Counter-Strike: Source 2004 beta, which was initially released by Valve to participants in their cyber cafe program on August 11, 2004. This is the only map available without using the console.
I'm not familiar with de_dust before it got the HDR treatment, so I'm not going to talk about any differences between this map and the final one.