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Y20 Impulse
Successfully complete all missions on the Hard difficulty setting to unlock the Y20 Impulse.
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Genocide Gun
Successfully complete all missions on the Inferno difficulty setting to unlock the Genocide Gun.
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Zero Laser Rifle
Successfully complete all missions on the Easy difficulty setting to unlock the Zero Laser Rifle.
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Achievements
Do the following things to obtain the corresponding Gamerscore points:
| 50 Points |
| All Stages Cleared - Easy | Acquired after clearing all stages in Easy mode. | | | 100 Points | | All Stages Cleared - Normal | Acquired after clearing all stages in Normal mode. | | | 150 Points | | All Stages Cleared - Hard | Acquired after clearing all stages in Hard mode. | | | 200 Points | | All Stages Cleared - Hardest | Acquired after clearing all stages in Hardest mode. | | | All Weapons Acquired | Awarded after acquiring all the weapons in the game. | | | 300 Points | | All Stages Cleared - Inferno | Acquired after clearing all stages in Inferno mode. | | | | | | | |
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ZE Launcher
Successfully complete all missions on the Normal difficulty setting to unlock the ZE Launcher.
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PX50 Bound Shot
Successfully complete all missions on the Hardest difficulty setting to unlock the PX50 Bound Shot.
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Easily complete Mission 13
Walk to the water and swim. Let all the ants gather around you. Eventually you will be able to walk on top of them and they cannot attack you. Just run around and shoot at your feet and they will eventually die. You can do this on the Inferno difficulty setting and get the mega powered weapons early.
