Each game in the series identifies boss weak points differently, either by blueprints on a field journal or a PDA.
The first two games featured a field journal containing blueprints given by a wounded character (a wounded scientist in the first game, and AMS agent "G" in the second). While the first game showed only the blueprint, the sequel showed the journal flipping pages to the blueprints of the boss encountered.
The field journal does not return in the next three games, III, 4 (along with its Special) expansion), and Scarlet Dawn. Due to evolving technological advancement, it was replaced by a PDA developed by the AMS, which contains a camera/scanner that photographs/scans a boss and digitally analyzes and identifies its weak point by beeps.
In the series' prequel, Overkill, blueprints for the bosses' weakpoints are shown in the loading screens before the boss fight.
Boss weak points (By Game) Edit
|Chariot (Type 27)||Exposed glowing-red part of right breastplate (with armor); whole body (without armor)|
|The Hangedman (Type 041)||Whole body|
|Hermit (Type 6803)||Head|
|Magician (Type 0)||Exposed arm and leg muscles.|
|Boss||Weak point||G's File Entry|
|Judgment (Type 28)||Zeal (small flying creature); Kuarl (armored behemoth) for chip damage|
|Hierophant (Type B 05)||Heart|
|Tower (Type 8000)||Open mouths|
|Strength (Type 205)||Head|
|Magician (Type 0)||Exposed arm and leg muscles|
|Emperor (Type α)||Chest organ. Also transforms into Zeal from Judgment, the Heirophant, a Tower serpent, and Strength; each have same weak points as before|
Fool: Clawed feet.
Sun: Tentacles, head-studded trunk, and serpent heads emerging from petals.
Wheel of Fate: Glowing sun-like emblem on chest (listed as "Analysis is Impossible").
Justice (both games): Tongue.
Lovers: Male spider atop the much larger female.
Star: Scarred chest and head (listed as "No Damage ?").
The World (both forms): Red heart in the slit on his chest.
Magician (Special only): Exposed arm and leg muscles.
Chariot: Left shoulder (first part of fight); exposed portion of armor (second part of fight; whenever the player's RPG rocket hits).
Hangedman: Whole body.
Moon: Third eye.
The House of the Dead: Overkill/Extended Cut Edit
Jasper Guns: Head.
Coco and Sindy (Extended Cut only): Coco.
Screamer: Head and chest.
Nigel and Sebastian: Sebastian.
Meat Katie (Extended Cut only): Cow-like udder.
Crawler: Insectoid arms and head.
Lobber: Arms and head.
Brutus the Ruthless: Weaponized right arm.