This subject is related to the Black Mesa Incident era.
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This subject is related to the Black Mesa Incident era.
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Biographical information


Function(s) / Belongings
Rank / Occupation

Human resources employee

Physical description


Chronological and political information

Black Mesa Incident


Black Mesa personnel

L.M.[1] (written as "LM") are the initials of a Black Mesa employee working in the Support Personnel Division[2] / Civilian Recruitment Division[1] at the Office of the Administrator. These initials can be seen three times in the games' instruction manuals. L.M., whose complete name is unknown, was therefore working for Dr. Breen, probably as a human resources secretary, and seemed to handle important to trivial affairs. The "OTA" preceding the initials likely stand for "Office of the Administrator".


L.M. appears in three letters, all dated "May 200-", when the Black Mesa Incident occurred.

Half-Life instruction manual[edit]

L.M. was Gordon Freeman's contact when he was still at Innsbruck. On May 5, 200-, L.M. sent a letter to Gordon to confirm the outcome of a telephone conversation where Gordon was offered, and accepted, a position at Black Mesa as a Level 3 Research Associate assigned to the Anomalous Materials Laboratory. In the letter, L.M. adds that Gordon's employment will commence "immediately but no later than May 15" and mentions that Dr. Kleiner, who was the one who had recommended Gordon to Black Mesa's Civilian Recruitment Division in the first place, also wishes to express his congratulations to Gordon for his successful hiring.

Half-Life PlayStation 2 instruction manual[edit]

On May 11, 200-, L.M. wrote a memo to Colette Green, with a C.C. to Kleiner. In it, L.M. tells Green that the supervision team is particularly interested in Xen crystal sample GG-3883. Although Green's experiments on the sample revealed unexpected spectral analysis fluctuations, the fact that Green has identified it as the purest and largest sample they own has led the supervision team to decide to replace the original chosen sample, sample EP-0021, with GG-3883 in the coming simulation. L.M. states that the supervision team is conscious that a sample change made so suddenly so close to the experiment is a violation of normal anomalous materials handling protocol, but stresses that such a deviation is necessary in order to have the sample ready on time and that he/she has already authorized a materials requisition form, included with the letter, that will be required to switch the samples. L.M. closes the letter by instructing Green to ensure that the sample is ready to be delivered to Gordon Freeman on the day of the experiment.

Of note is that Half-Life 2: Episode Two reveals that the G-Man delivered sample GG-3883, while Dr. Breen was also somewhat responsible for the events that transpired.

Half-Life: Blue Shift instruction manual[edit]

On May 9, 200-, L.M. wrote a letter to Barney Calhoun to inform him that the office of the Administrator has decided to reassign him to Blue Shift effective May 15. L.M. explains that Blue Shift assignment will require him to report to Personnel to process his salary increase and retinal scan before May 12, and that he will be scheduled for a two-day training course that will prepare him for assignment in the high-security areas of the Anomalous Materials labs. Finally, L.M. informs Barney that he must report to the section manager of the Area J Medium Security Facilities by 0800 on May 15 to receive his assignments, instructing him to refer to an attached security shift schedule for more details.

Behind the scenes[edit]

"L.M." are the reversed initials of series' writer Marc Laidlaw, placed there as an Easter egg.[3]


List of appearances[edit]


  1. 1.0 1.1 Half-Life instruction manual
  2. Half-Life: Blue Shift instruction manual
  3. Marc Laidlaw Vault on the ValveTime Forums