2017 print edition.
P. 31, last sentence under TAG
"If a 'Mech uses TAG against a target and misses, the 'Mech can still attempt to spot any target for indirect fire in the normal fashion."
should be changed to:
"If a 'Mech uses TAG against a target and misses, the 'Mech can still spot any target for indirect fire in the normal fashion.",
as spotting without a TAG is automatic as long as the spotter has LOS to the target it declares to spot.
Pp. 36-37 - Death from above
Problem: The fourth paragraph under the Weapon Attack Phase section on p. 149TW / p. 53 Introductory Rulebook suggest, that only if the DFA is successful, the attacker takes the damage as described in the Damage to Attacker section on p. 150 TW / p. 54 Introductory Rulebook. BMM does not communicate this fact clearly.
Solution: Change the description of the DFA rules on pp. 36 - 37 BMM to make it clear, that the DFA Damage to Attacker only applies if the attack is successful. The simplest way to do it would be probably to change the wording of the DFA Damage to Attacker section itself. For example you could change the beginning of this section from "To determine damage to attacker, divide[...]" to something like "In case of a successful DFA attack determine damage to attacker, dividing[...]". I would advise against fixing the problem in the same way as it was done in the TW/Intro Rulebook, as placing rules on who takes damage from a DFA in the Weapon Attack Phase section (as it is done in those books) can be confusing.
Edit: Perhaps a better way to fix the problem would be to pretty much much keep the wording from the TW/Intro Rulebook, but put it in the separate section, so it is clear, that those rules are meant for the Physical Attack Phase, not Weapon Attack Phase, so on p. 37 BMM between Weapon Attack Phase and the DFA Damage to Target section insert the following section:
"Physical Attack Phase
If the DFA attack is successful, both BattleMechs take damage as determined bellow. If the attack fails, the attacking 'Mech crashes to the ground and takes damage (see
Falls After DFA, at right)."
There should be more than enough space on p. 37 to add this bit.
P. 37, Second paragraph under Falls
Problem: In
http://bg.battletech.com/forums/index.php?topic=55599.0 it has been determined, that a 'Mech that falls due to an unsuccessful DFA attack takes damage to it's back, but still rolls in Facing After Fall Table to determine it's final facing (see answers to questions 2 and 3 in the thread linked above), however the rules still don't reflect it.
Suggestion: Change the paragraph to something like "On an unsuccessful attack, the attacker automatically falls taking damage as though the 'Mech had fallen 2 levels onto its back, regardless of the facing rolled in the Facing After Fall Table (see Falling, p. 56)".
P. 78 Battlefield Support Table
Problem: Copperhead ammo has a Target Number 8, but is supposed to seek it's targets like an Arrow IV round, Illumination/Smoke ammo has a double dagger in place of a target number, but their rules say nothing special about how to determine if those rounds hit. Those values/symbols are likely swapped.
Solution: Change Copperhead Target Number to double dagger, change Illumination/Smoke Target Number to 8.
Pp. 86 and 90 - Bad Reputation quirk.
Problem: On p. 86 the description of Bad Reputation quirk mentions Battle Hawk as an example of a 'Mech that qualified for this quirk early on, but lost it later. On p. 90 in the BattleMech Quirk Table Battle Hawk has no expiration date for this quirk.
Solution: Either add the date after which Bad Reputation quirk no longer applies to Battle Hawk, or change the example 'Mech on p. 86 to a one that has such date (like a Banshee).
Problem 2: Bad Reputation quirk rules mention, that the clan MechWarriors piloting 'Mechs with bad reputation begin battle fought under
Clan Honor rules with one
dezgra point. As far as I know
Clan Honor rules don't appear in the BMM book, only in TW.
Solution 2: Add an appropriate page reference to the Clan Honor rules (the rules begin on p. 273 TW,
dezgra points are explained in the "Declaring a Duel Void" section on p. 275), or at least an information, that Clan Honor rules are not covered in BMM.
Problem 3: On p. 90 Blackjack has a Bad Reputation quirk assigned without an expiration date, but on p. 196 SO Blackjack is mentioned as a 'Mech with this quirk "during the Succession Wars".
Solution 3: Add an expiration date to Blackjack's Bad Reputation quirk (probably at some point between 3022 and early 3050s judging from Blackjack's descriptions on p. 128 TRO 3039 and p. 46 TRO 3050 Upgrade). Alternatively you change the example 'Mech on p. 196 SO, but as said above it does look like Blackjack should lose the quirk at some point after 3022, so in this case my suggestion is to change the BMM, and not the SO.
P. 101 - Machine guns - Rapid-Fire Mode (Optional)
Lostech Streak Machine Guns?Problem: I think it is clear that the intent of those rules is, that you are supposed to roll to determine ammunition consumption weather you hit or not, but according to the rules you use up "the number of rounds equal to damage it [the MG]
inflicted x 3", so read literally they say, that if you miss your attack with an MG in Rapid-Fire Mode you consume no ammo.
Solution: The rules should be reworded to match their apparent intent.
P. 108, Nemesis Pods
First bullet point - change to something like "the Nemesis-tagged 'Mech is in a hex lying along the LOS between the attacker and the original target, and", as there is no concept of LOS going thru units in Battletech - only thru hexes.
Change or add a clarification to the second bullet point to indicate that it is possible to redirect indirect fire even to a unit the attacker has no LOS to (using the rules for indirect LRM fire against Narc-ed targets with no spotter found on p. 104).
See
http://bg.battletech.com/forums/index.php?topic=59531.0 for details.
P. 119, under Coolant Pod.
Problem: The rules on coolant pods fail to mention, that the pods are one-shot systems. This is likely because the rules in BMM are based on the rules section on p. 304 TO, while one-shot nature of coolant pods is mentioned in the fluff section on p. 303 TO.
Solution: Add a note, that each coolant pod may be used only once per game. Clarify that a critical hit to a used coolant pod does not cause not internal explosion (per
http://bg.battletech.com/forums/index.php?topic=59493).