Transformers: War for Cybertron - Decepticons (Nintendo DS)

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Arena characters

Defeat the indicated Boss as an Autobot (to unlock an Autobot Boss) or a Decepticon (to unlock a Decepticon Boss) in the Arena to unlock them as a playable character.

CharacterHow to defeat
Air Raid ( Autobot )Defeat him in Streets stage #6 (Arena stage #18).
Barricade ( Decepticon )Defeat him in Stadium stage #6 (Arena stage #6).
Breakdown ( Decepticon )Defeat him in Dam stage #6 (Arena stage #24).
Cyclonus ( Decepticon )Defeat him in Streets stage #6 (Arena stage #18).
Grimlock ( Autobot )Defeat him in Purification stage #6 (Arena stage #30).
Hot Rod ( Autobot )Defeat him in Dam stage #6 (Arena stage #24).
Jazz ( Autobot )Defeat him in Stadium stage #6 (Arena stage #6).
Motormaster ( Decepticon )Defeat him in Sewers stage #6 (Arena stage #12).
Shockwave ( Decepticon )Defeat him in Purification stage #6 (Arena stage #30).
Ultra Magnus ( Autobot )Defeat him in Sewers stage #6 (Arena stage #12).

Kup sequence

After tutorial cinematic is over, enter the first room. Talk to Ratchet and Air Raid, then turn right. Find the three computer monitors along the wall. Walk up to the middle monitor that is under the spotlight. You wil have a conversation with a person named Kup.

Ramjet

Enter 99871 as a code to unlock Ramjet in Campaign and Multiplayer modes.

Silverbolt

Enter 10141 as a code to unlock Silverbolt in Multiplayer mode.