Ok, this is going to be a bit of a hassle... first off:

1) You don't need an emulator to run this game! What this site is offering is
the Inform source code for deadline. Inform is a compiler that builds zcode
files. Zcode files are game files that can be run on any platform (Mac,
Windows, Unix, even Palm!) with the help of an interpreter program.

2)Interpreter programs are freely avalable from:
ftp://ftp.gmd.de/if-archive/interpreters-infocom-zcode/zip/
Personally, I suggest MaxZip-178.hqx. 

3) Normally, you would now simply download the zcode (.z5) file and play it on
the interpreter. However, due to legal reasons Deadline.z5 cannot be posted for
download, only the source code. (Deadline.zip) This leaves you with 2 options:
	1) Download the Inform compiler from here:
	ftp://ftp.gmd.de/if-archive/infocom/compilers/inform6/executables/
	(You'd want inform621_mac361.hqx)
	and compile it yourself
	or
	2) Email me your email address (I'm Noiamnotgod@aol.com) and 	I'll send you
the compiled zcode file.
Hope I've been helpful and not too confusing,
Chris