Hammer 4 (still sometimes internally referred to as Worldcraft) and its documentation have been released to people who have pre-loaded HL? and unlocked it over Steam. The documentation is also available for everyone else to peruse here!
Half-Life ? itself is to be released in about ten days.
<hr noshade color="gray" width="75%">Tutorial
Ministeve has produced a basic tutorial for those of you interested in mapping for HLDM, check out:Half-Life Death Match
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