It might be in a BRL archive somewhere (alas I do not have it).  You might ask if Doug Gwyn has one squirrelled away.

From: Dr Iain Maoileoin <iain@csp-partnership.co.uk>
Sent: Friday, December 6, 2019 12:58 PM
To: ron@ronnatalie.com
Cc: tuhs@minnie.tuhs.org
Subject: Re: [TUHS] Gaming on early Unix

On 6 Dec 2019, at 16:19, <ron@ronnatalie.com> <ron@ronnatalie.com> wrote:

There was another multiplayer game called “Search” that would result around 4:30 in the afternoon someone yelling “Search Up” which was everybody’s cue to join in the game.

Ron (all) I have been trying to track down search for years.  We ran a modified copy at the Universirt of Strathclyde Computer Department - it would be good to get a copy for the next reunion.

I have been totally unsuccessful over a decade trying to locate the source.  (try a google search for search! [and a million other attempts]) 

Any ideas if it still exists?

Iain