Armored Core: Silent Line Cheats

Bonus parts:
For every mission you get an "A" or "S" rank on, you will get a special bonus part.

Add defeated AC emblems:
Press Select + Start when the victory message appears in the arena to add the defeated AC's emblem to your list.
User Cheat by MechCrazy

Overboost:
To boost faster press both L3 and R3. You should boost forward at twice the normal speed until you run into something.
User Cheat by MechCrazy

Hydraulics
Get a robot with the tank wheels. Press X repeatedly and it appear as if the robot has hydraulics.
User Cheat by MechCrazy

CCH-04-EOC:
After finishing the 2nd part within 120 sec and with 50% of more Ap left.

MRL-MM/001:
This is a back radar weapon which can be unlocked by reaching rank D..

MWGG-HNRL-100:
This is a napalm rocket which can be unlocked by reaching rank C.

KAW-SAMURAI2:
This is a weapon arm which can be unlocked by reaching rank B.

MAM-MX/MDD:
This is an arm which can be unlocked by reaching rank A.

MBT-NI/GULL:
This is a booster which can be unlocked by reaching rank S.

MWG-HGB/108:
This is an AST Hand Gun which can be unlocked by finishing every mission with Rank S.

CCL-02-EI:
This is a core which can be unlocked by increasing your crest point to 10.

MCM-MI/008:
This is a core which can be unlocked by increasing your mirage point to 13.

KEEP-ELIX:
This is an energy pack which can be unlocked by increasing your Kisaragi Point to 7.

Op-Intensify:
This is an optional intensifying part which can be unlocked by finishing the game with an 99% completion. You can also import this part from Armored Core 3 using a save file. This means you will have the ability to use this part from the very beginning

Add defeated AC emblems:
Press Select + Start when the victory message appears in the arena to add the defeated AC's emblem to your list.

Defend Lawdas Factory mission- Hidden part:
When the big laser destroys the missile in the center of the map, jump down and look for the part. The part is an extension CWEM-RT16.

Defend Mirage HQ mission- Hidden part:
When the mission starts, turn around and boost towards the helicopter landing site. Look around the landing site to find the back stealth missile, MWM-SM36.

Destroy AI Prototype mission- Hidden part:
On the ground in a small room closed off by destroyable gates is the left arm part KSS-SS/707A.

Destroy Cargo Transport mission- Hidden part:
Use a very fast AC for this mission. When you see the first intersection, instead of turning right with the transport, turn left and jump behind the middle barricade and get the part. It is the inside floating mine, CWI-FMHS-30.

Eliminate Bio Weapon mission- Hidden part:
At the first room, turn left and keep shooting all over the wall. When you reveal a secret passage, follow it to the part. It is a PRAYYING BLADE.

Eliminate Rioters mission- Hidden part:
When you reach the most top level and enter, a box will be destroyed by enemies. On the floor is the inside part KWL-RJ/60.

Explore Unexplored Region mission- Hidden part:
Go into the crater to find a plane. Shoot the back end of the plane to destroy that section. Inside the plane is the back part MWC-OC/30.

Infiltrate New Base mission- Hidden part:
In a cave in the middle of the map is the extension part MWEM-R/36.

Protect Part Transport mission- Hidden parts:
Wait until the plane lands, then get behind the it. Shoot the back end until the door explodes. Press Circle next to the part to get the right arm part CWG-ARF-180.

Search Vilius Laboratory mission- Hidden part:
Search the bottom of the deepest pit to find a part guarded by a MT. It is the left arm part MWG-KPL/150.

Prototype parts:
If you use a certain type of leg part (light weight leg, middle weight leg, hover, etc.) for enough missions, a "prototype" part will be unlocked in the shop. The prototypes are usually good. This may also be the case with other parts as well.

Slint Line:Armored Core Code Breaker Codes

Slint Line:Armored Core GameShark V3 Codes (NA)

Slint Line:Armored Core Pro Action Replay Codes (NA)

Bonus parts:
For every mission you get an "A" or "S" rank on, you will get a special bonus part.

The following are the other requirements to get bonus parts at the store.

MRL-MM/001:: By reaching AC rank "D"
MWGG-HNRL-100: By reaching AC rank "C"
KAW-SAMURAI2: By reaching AC rank "B"
MAM-MX/MDD: By reaching AC rank "A"
MBT-NI/GULL:: By reaching AC rank "S"
CWI-DD-30: After beating E-21 at the Arena
RGI-KDA01: After beating E-15 at the Arena
KWG-NHZL30 : After beating E-8 at the Arena
CWR-M70: After beating D-7 at the Arena
CWM-BM60-1 : After beating C-7 at the Arena
MWG-SRFE/8:: After beating B-4 at the Arena
MCL-SS/RAY:: After beating A-3 at the Arena
MWG-MG/FINGER : After beating A-1 at the Arena
CWM-HA40-8: After beating rank 1 in Extra Arena
MWG-HGB/108: Rank "S" in all missions
KGP-ZXV1: Complete all missions
CCL-02-EI: Complete 10 missions from Crest
MCM-MI/008: Complete 13 missions from Mirage
KEEP-ELIX: Complete 7 missions from Kisaragi
Op-Intensify (All Abilities): Obtain 99% completion of the game.

Get easy money:
Find any mission that has an advance payment. Start the mission and immediately abort it. After this is done, you will see your earnings displayed in two boxes. One box is for your new money amount that was earned and one for the deductions for repairs, ammunition, and the special deduction in the event that something was destroyed that was not supposed to. Note that there is no deduction, and you will get the amount that was promised to you in advance. Make sure to save your game before you do this, as the game will end if this is done too many times.
User Cheat by SamIam

Hydraulics:
Get a robot with the tank wheels. Press X repeatedly and it appear as if the robot has hydraulics.

OP-Intensify warning:
Be careful when you use OP-Intensify. Even though it gives above average abilities, your AC will take much more damage then if it did not have it equipped.