The body itself is likely Albert Hartman.
Finale has done a lot of work on cracking this part of the ARG, for further reference please see his Steam guide created for this.
It's located in reserve2 and is a code written on the sheet which covers a corpse in a side building.
Cracking the code
The code sequence for the body message is:
B1 C3 F1 B2 F2 C4 E4 G3 B2 G1 F4 B4 B2 G1 G2
Which translates to:
I will (F1(show?)) the (F2(correct?)) (C4(code?)) to tell the right answer to the right person.
The entire body message revolves around a series of letter-number references, which correspond to words that have been found in INFRA maps and textures. The following is a table containing all of the current keys and their corresponding words. Bold ones are in use by codes.
|A1||What||See Steam Guide||Confirmed|
|A2||Happened||See Steam Guide||Confirmed|
|A3||To||See Steam Guide||Confirmed|
|A4||AH||See Steam Guide||Confirmed|
|B1||I||Central Note 1||Confirmed|
|B2||The||Central Note 1||Confirmed|
|B3||In||Central Note 1||Confirmed|
|B4||To||Central Note 1||Confirmed|
|C1||Is||See Steam Guide||Confirmed|
|C3||Will||Central Note 1||Confirmed|
|C4||Code||S.N.W Reactor Infoboard||Likely (It fits)|
|D1||Other World||Bunker Drawing||Probable|
|E1||IS||See Steam Guide||Confirmed|
|E4||To||Unconfirmed||Inferred from bunker computer code|
|F1||Show||Guess||Likely (It fits)|
|F2||Correct||Guess||Likely (It fits)|
|F4||Answer Under Ground||Mörkö painting in Bunker||P. confirmed - 3 words|
|G1||Right||See Steam Guide||Confirmed|
|G2||Person||See Steam Guide||Confirmed|
|G3||Tell||See Steam Guide||Confirmed|
|H4||????E||Unconfirmed||Inferred from bunker computer code|
The hint Zuntti gave us for this "code segment" is "BUN_BREAKER_CEN_CONTROL_VI_OFFICE_RE_SNW".
There are four clues here, each representing a location or map in INFRA.
This clue refers to the breakers outside the Bunker, in the Servicetunnel map. This has been confirmed by Zuntti's screenshot.
Possibilities here are the signs on the breakers themselves which have small text as follows:
(Breaker 1) Main text: TGD-SBC-4, small text: BR4 TGDNUM PO7 TGD1
(Breaker 2) Main text: HW-SBC-2, small text: BR4 HWNUM+1 O34 C87 EA2 N6
TGD could mean Two Gorges Dam, and HW is probably Hammer Valley Water Dam. Both breaker small texts have a "NUM" on them, prefixed by their name, with 1 being added to HWNUM.
Another possibility was the book with the bunker codes, however some codes are completely illegible and decoding with several bases does not result in anything of note.
Reading only the letters on breaker 2 reveals word "OCEAN". The breaker is assigned with number 2 so HWNUM+1 could be 3.
Comparing numbers to first letters of bunker computer yields: POR TGDU ODE COR EAU NG , which can be re-arranged into: ATOP UNDERGROU_D CORE
This clue refers to the control room in Central, where there are a few code possibilities.
The first one is the Central projector morse, which does not produce a code but a message/clue about "the right person".
The second one is the pegboard, which has two possibilities of its own: the pegs, the markers behind, and the unrelated notes stuck to the pegboard.
(Click this image for a HD, zoomable view.)
These are the pegboard pegs, transcribed.
E means empty, P means peg and M means peg with marker.
MPMEEMPMPMEEEMPMPMPEEEMP PMPMPPEPEEEEEEEEMPMPMPMP (empty for 2 lines) (break) (empty for 4 lines) (break) MPMPMPEEEEMPMPEEEEMPMPMP PMPMPMPMEEEMEMPEPMPMPMPM (empty for 2 lines) (break) MPMPMPMPEEEEEEEEEEEEEEEE PMPMPMEEEEEEEEEEEEEEEEEE (empty for 2 lines) (end)
RT 34968 BG 125675567 HK 675756 B1 = I KK 32 32123 B2 = the 1231324 123 B3 = in 364363463 B4 = TO 423424234 423 54353 C3 = 1(KKKKKKKK) = WRONG 234 OIYUIO W1I1L1L1 = RIGHT tr45 YTIT NOT B5675675567 Maybe YTWE 91267867
Removing the clutter, we can solve B1, B2, B3, B4, and C3:
B1 = I B2 = the B3 = in B4 = TO C3 = WILL
CODE: 13523523578 YOU HAVE TO REMEMBER THAT OR YOU WILL GET SOME RANDOM STUFF I have no idea what is the stuff you know (unreadable) (unreadable)
See Villa woodboxes.