These are
non-indoeuropean Turdetanian warriors from the southwest, around Gadir and Corduba:
http://i.imgur.com/3EYufyu.jpg
Some consider them a branch of the iberians, some say they formed their own cultural group (for instance, they had their own language different from iberian).
The famous long-neck helmet was probably
only used by them (i have seen so many mods call this "celtiberian warriors"). Not even other non-indoeuropean iberan warriors used that cap. The material is not known, some say sinew, some say leather, but there are not archeological evidences. Its purelly based on this relief found in the Turdetanian/Tartessian area of influence (i believe it was found in the province of Seville):
http://1.bp.blogspot.com/-rkhC-7tqfI...320/ibero4.jpg
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Now these could belong to most iberian tribes, but i think they are usually more related to the
south-eastern groups, mainly the Bastetani and the Contestani if i am correct (probably up to more northern levantine groups, like the edetani):
http://i.imgur.com/ClsLPgS.jpg
The wolf shaped pectoral is inspired in this sculpture found in La Alcudia (province of Alacant/Alicante), i believe that is the Contestani zone, but they were probably very similar to other iberians (Bastetani, Edetani etc) save the Turdetanians and the ones more to the north.
http://i.imgur.com/uT8UwGL.jpghttp://celtiberia.net/imagftp/im4978...de%20Elche.jpghttp://i.imgur.com/qPi5g6x.jpg
The sculpture to the right is probably the main source for the "bascient" type helmet that you have seen in Jack Lusted's previews. I believe it could be made both of metal and leather, plain or with a crest.
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Now the heavy infantry in scale armor you have seen in Europa Barbarorum is based on
Edetani from the levantine coast:
http://1.bp.blogspot.com/-fLEdNj3DEz...s-edetanos.jpg
In my opinion this is a pretty lazy, literal and non-imaginative at all interpretation of the following vase (found in the Edetani zone, in the province of Valencia). They even kept the monotonous color scheme of the pottery for everything... (shield, armor, clothing...) ¬¬
http://contestania.com/images/cerami...oguerreros.jpg
Also based on that vase,
some people have asumed they used body painting/tatooing (?) (check the black drawings in legs and arms), but i doubt there is actually any real reference for that other than the vase, it could be any kind of ornamental piece. In the other hand, i seem to recall reading somewhere that that vase depicted warriors in ceremonial garments, so body paint could make sense if it's any kind of ritual. Check the images (Note that these are very personal interpretations by a particular author (Dionisio A. Cueto), so be adviced):
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And now, these are
celtiberians, an entirelly different beast. They were
CELTS with iberian influences (and or interbred with iberians). They spoke a celtic (indo-european) language:
http://i.imgur.com/V9tKQi9.jpg
http://en.diorama.ru/_img/content/gallery/3361/2.jpg
Note they use a mixture of iberian (non-celtic) and La Tené (celtic) equipment, like the montefortino helmet (celtic), celtic straigth swords (althought i believe they also used iberian falcatas to some extent), iberian caetras (small, round shield), celt-ish oval shields (althought the iberians also used similar -smaller- oblong shields, like the ones in the turdetanian images above), celtic chainmail, iberian round breastplates, etc.
So these people were mainly a mixture of celts and iberians.
The round shields and pectorals are probably inspired in this (found in the celtiberian zone around Numantia, these 2 are from the provinces of Guadalajara and Teruel and you can see them at the Archeological Museum in Madrid, if you visit it):
http://i.imgur.com/xTB9zJn.jpg
The warrior with the black goat-skin cape i seem to recall is a reference to a Diodorus Siculus' text.
edit: i found it:
Spoiler Alert, click show to read:
Having spoken of the Celts, we shall now give an account of their neighbours the Celtiberians. The two ((DIFFERENT)) nations Celts and Iberians, heretofore breaking forth into a war about the boundaries of their countries, at length agreed to inhabit together promiscuously, and so marrying one with another, their issue and posterity (they say) afterwards were called Celtiberians. Two potent nations being thus united, and possessed likewise of a rich and fertile country, these Celtiberians became very famous and renowned; so that the Romans had much ado to subdue them after long and tedious wars with them. These Celtiberians bring into the field not only stout and valiant horsemen, but brave foot, both for strength and hardiness able to undergo all manner of labour and toil. They wear black rough cassocks made of wool, like to goat's hair. Some of them are armed with the Gaulish light shields, others with bucklers as big as shields, and wear greaves about their legs made of rough hair, and brazen helmets upon their heads, adorned with red plumes. They carry two-edged swords exactly tempered with steel, and have daggers beside, of a span long, which they make use of in close fights. They make weapons and darts in an admirable manner; for they bury plates of iron so long under ground, till the rust hath consumed the weaker part, and so the rest becomes more strong and firm. Of this they make their swords and other warlike weapons; and with these arms, thus tempered, they so cut through every thing in their way, that neither shield, helmet, nor bone can withstand them. And because they are furnished with two swords, the horse, when they have routed the enemy, alight and join with the foot, and fight to admiration.
Also... lol, i had not read this part:
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And these are only Iberians and Celtiberians. The other half of Hispania looked completelly different, since they were mostly celts or heavily celticied, and this includes Lusitanians and Cantabrians. In the small northern mountain area around the border with france (the Basque Country) there were aquitanian (non-indoeuropean) tribes, like the Vascones, which also were different, since they were very isolated (their language is the only pre-roman language still alive today in Spain)
Look at this map:
http://www.arkeotavira.com/Mapas/Ibe...puli150dpi.jpg
The orange zone is the iberian zone (bastetani, oretani, edetani like the shown above in the pics), the blue zone is the turdetanian zone (also shown above). And the green zone is the Aquitanian zone. These 3 zones were
NOT INDO-EUROPEAN (remember this is not necesarily a reference to culture, but to language, but you get the point).
Now the entire Yellow-ish zone is the celtic zone (includes the mixed celtiberian zone in middle), and they had a completelly different culture. As you can see, hispanic peoples were not only different tribes within the same cultural whole... there were several
ENTIRELLY DIFFERENT CULTURES with several very distinct languages (4 main groups: turdetanian, iberian, aquitanian and celtic).
So talking about all of the different cultures that inhabited the peninsula as if they were equals is as wrong as if you said that the Romans and the Cisalpine gauls were the same people.
