Its by nipper. One of the best mappers for CS/CSS. He made legendary maps:
blahhh (CSS/1.6)
ctf_hallofdeath (TF2) - which unlike the cs version rules
de_westwood
Look here for some more maps of him (note that even these arent all his maps) http://www.fpsbanana.com/members/maps/116727
Still, you must like abstract maps or just insane maps.
This is the score board of favorites, and he is second on that one... however, that bigdog has posted over 600 maps and nipper only has 163.
There is only 1 team of 2 mappers better than nipper to me (which stopped mapping sadly). those are StarD00d & Magikus of http://www.d00ds.com/. they made losttemple, rush, nightfever and cpl_fire.
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