Location of all Arena Bonus Items, Archimedes´ Diary pages & Secrets:
The Storm Breaks
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4 in total:
1. Archimedes Diary : Exit the 1st battle area (just past where the Sappers
appear). Hard left behind a staircase.
2. Archimedes Diary : 2nd battle area. Top left landing.
3. Arena Bonus Item : 2nd battle area. Far right behind wall and on landing.
4. Archimedes Diary : 3rd battle area. To the right of the far catapult.
A Spartan Welcome
-----------------
11 in total:
1. Arena Bonus Item: In island compound near the training Romans
2. Archimedes Diary: To the left of main ramp behind training Romans
3. Arena Bonus Item: Hard left on far side of main ramp beyond
training Romans
4. Archimedes Diary: around the last corner of the trench
5. Archimedes Diary: at far left of rampart wall
6 - 8. Secrets: Contaminate Water Towers (x 3)
9 - 11. Secrets: Destroy Catapults (x 3)
The Last Stand
--------------
6 in total:
1. Arena Bonus Item: in alcove on right of mezzanine where Romans are
first encountered
2. Secret: Destroy Arms Dump
3. Archimedes Diary: behind wall to the left of battlefield. Jump around.
4. Archimedes Diary: in alcove to right of exit area
5. Archimedes Diary: at end of corridor of flame behind Spartans. Use
rubble to access.
6. Arena Bonus Item: in 3rd area with Archers. As entering on far right on
raised platform in corner. Access via stairs and
moving down and off landing.
The Badlands
------------
6 in total:
1. Arena Bonus Item: to the right side of the village on entering
2. Arena Bonus Item: to the right side of the village and behind tent on
entering
3. Archimedes Diary: in first open area after blowing first cave
4. Arena Bonus Item: at bottom of ramp (Spartan placed there after blowing
last cave and cut scene)
5. Archimedes Diary: on isolated outcrop of rock crossed by bridge
(3 Berserkers; Fire Arrows & Shrines also located here)
6. Archimedes Diary: in last accessible area (Key & Explosive Chest also
located here)
The Wild Bunch
--------------
3 in total:
1. Archimedes Diary: at rear of village behind burning fire
2. Arena Bonus Item: at rear of village and around corner by fence
3. Arena Bonus Item: in last battle area by fence (accessible after
killing Beowulf)
The Ruin of Heroes
------------------
6 in total:
1. Archimedes Diary: behind the Spartan at starting point
2. Arena Bonus Item: to the left of 1st Health Shrine at top of ramp
3. Archimedes Diary: on far side of fallen pillar and hard right
4. Arena Bonus Item: beyond collapsing ramp on right of platform
5. Archimedes Diary: to the right of overhead bridge where Sejanus
is first encountered
6. Arena Bonus Item: in corner of Sarcophagi room
Ghosts of Troy
--------------
5 in total:
1. Archimedes Diary: on left in corridor beyond the Sarcophagi room
2. Arena Bonus Item: in alcove on right at rear of huge chamber with
glowing pits and Undead
3. Arena Bonus Item: in fractured hallway with Castor. Jump around.
4. Archimedes Diary: on platform amongst rubble of huge chamber with
Trojan Horse
5. Archimedes Diary: hard right on small platform in chamber of chasms
where Sejanus and Undead Archers encountered
The Sentinel
------------
No items
Resistance
----------
16 in total:
1. Arena Bonus Item: looking at Archimedes, at end of bottom right passage
2. Archimedes Diary: further down same passage against wall
3. Archimedes Diary: on ramp and up Ladder #1 and with two Shrines
4. Archimedes Diary: on roof of Building to the left of previous location
5. Arena Bonus Item: on ramp and up Ladder #2
6. Arena Bonus Item: against wall by one of the main gates in the back streets
7. - 11. Secrets: deface poster of Tiberius (x 5):
1 at Bacchus Inn
2 on roof of building directly across the street
3-5 all located in street or on ramps
12. - 16. Secrets: burn Roman Houses (x 5):
All located in the streets behind the Bacchus Inn
Revolution
----------
17 in total:
1. Archimedes Diary: on roof in back left corner of Athens Town Square
2. Archimedes Diary: on roof of the green-hued building
3. Arena Bonus Item: in prison complex in cell on the right
4. - 8. Secrets: deface poster of Tiberius (x 5):
1-2 on rooftops in Athens Civic Square
3-4 of rooftop of green-hued building. On ramp
of building opposite.
5 on ramp in red-hued building
9. - 13. Secrets: burn Roman Houses (x 5):
1 enroute to the green-hued building
2-3 on ramp and at street level opposite green-hued
building.
5 en route to Sejanus´ mansion
14. Secret: Agrippa the Healer. Female on ramp in red-hued area
15. Secret: Jilted Husband. Opposite old Greek Veteran
16. Archimedes Diary: Offered by jilted husband after killing Carnifex
17. Arena Bonus Item: ONLY possible en route to Ambush. Offered by saved
Athenian
Eye of Apollo
-------------
3 in total:
1. Archimedes Diary: by the first set of levers
2. Archimedes Diary: by the fourth set of levers
3. Archimedes Diary: on the rooftop
The Gates of Saturn
-------------------
5 in total:
1. Arena Bonus Item: in building containing first Ballista
2. Archimedes Diary: on rear of field. Behind two fallen trees shaped like a V
3. Archimedes Diary: in cavity on ledge at rear of Fortress. Instead of jumping
on rubble through broken wall follow the ledge to the left
4. Arena Bonus Item: after killing 2nd Priestess, through double doors and to
the right
5. Archimedes Diary: on ledge, accessed by jumping over broken fence.
Accessible just prior to entering portcullis and fighting
Undead Sejanus
Death and Circuses
------------------
5 in total:
1. Archimedes Diary: down first passageway on right and around corner at end
2. Arena Bonus Item: after area with Rage Potion. Through portcullis on right
and around corner with Power Shrine
3. Archimedes Diary: left of two Archers standing in elevated area and around
corner
4. Arena Bonus Item: to right of ladder leading up to prison where Spartans are
located
5. Archimedes Diary: by pillar in Minotaur´s lair
Gods of Battle
--------------
4 in total:
1. Archimedes Diary: second corner to the left of Spartan at starting point
2. Archimedes Diary: hard right in room accessed by detonating explosive
3. Arena Bonus Item: at base of stairs leading to area with crates by gate
4. Archimedes Diary: in room with Romans + Assassins + Archers and explosives
------------------------------
6. THE ARENA
Bonus Items
-----------
The following can be acquired for use in the Arena:
- Hoplites
- Swordsmen
- Archers
- Gigantes *
- Vial of Rage
- Explosive Keg ( x 2)
- Invisibility Potion
- Kickable Brazier ( X 2)
- Fire Arrows ( X 3)
- Arrow-targeted Explosive ( X 3) **
- Health Shrine ( X 3)
- Power Shrine ( X 3)
- Arrows ( X 3)
- If using the Gigantes, it will appear next to the Spartan
at the commencement of ROund 1. Let the Gigantes charge
ahead THEN move. Keep some distance from the Gigantes during
combat.
- Using the Arrow-targeted Explosives is extremely hazardous
as Allied Archers can accidently detonate them while the
Spartan is nearby.
All-Star Arena
--------------
ROUND 1: Legionnaires
Centurions
Archers
ROUND 2: Barbarians - 5 varieties
Gigantes - 1
ROUND 3: Praetorian Legionnaires
Praretorian Carnifexes
Assassins
Inferni
Archers
ROUND 4: Skeleton Warriors
Skeleton Archers
Undead Warriors
ROUND 5: Gladiators - 3 varieties
ROUND 6: Repeat of ROUND 1
ROUND 7: Barbarians - 5 varieties
Gigantes - 5
ROUND 8: Repeat of ROUND 3
ROUND 9: Repeat of ROUND 4
ROUND 10: Repeat of ROUND 5
Source: http://www.gamefaqs.com/