Complete the following tasks to get the corresponding GamerScore.

Cleared Stage 1 - GamerScore 10:
In Single-Player Arcade mode clear Stage 1.

Cleared Stage 2 - GamerScore 10:
In Single-Player Arcade mode clear Stage 2. Cleared Stage 3 - GamerScore 10:
In Single-Player Arcade mode clear Stage 3.

Cleared Stage 4 - GamerScore 10:
In Single-Player Arcade Mode clear Stage 4. 30 Second Max. Bonus - GamerScore 15:
Maintain the Max. Bonus for at least 30 seconds.

Untouchable - GamerScore 15:
Using Tempest repel at least 20 enemy bullets. Don't Let Me Go - GamerScore 15:
With the anchor using Ruby hold onto an enemy for at least 10 seconds.

Incredible Restraint - GamerScore 15:
Don't use Sensei's sword for at least 30 seceonds.

Ruby Master - GamerScore 25:
Complete Single-Player Arcade mode without continues using Ruby.

Sensei Master - GamerScore 25.
Complete Single-Player Arcade Mode without continues using Sensei.

Tempest Master - GamerScore 25:
Complete Single-Player Arcade Mode without continues using Tempest.

'R.A.D' Master - GamerScore 25.
Complete Single-Player Arcade Mode without continues using R.A.D.

The following extras are unlocked when you complete the indicated task (continuing is allowed) using a certain character.

Unlock R.A.D as a Playable Character:
Using Ruby complete Arcade mode. Unlock Sensei as a Playable Character:
Using Tempest complete Arcade mode. Unlock Female System Voice:
Complete Arcade mode using R.A.D.

Unlock Arcade Mode ++:
Complete Arcade mode. Unlock Challenge Mode:
Complete Arcade mode. Unlock Challenge Mode ++:
Complete Arcade mode. Unlock Retro Mode:
Using Sensei complete Arcade mode. Unlock 5 Credits:
Play for 60 minutes.

Unlock 8 Credits:
Play for 180 minutes.

Unlock Unlimited Credits:
Play for 300 minutes.