Uploaded November 2015 | Updated September 2026, 2 weeks ago

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To unlock the Enemy of My Enemy achievement, you have to help the Elite General charge the hill in Osiris on Heroic difficulty. While this doesn't require co-op, I would recommend at least one co-op partner. The more people helping you, the easy this will be.

■ Achievement Playlist: bit.ly/1NE1w31
■ Subscribe: bit.ly/1LLX8vL
■ Second Channel!: bit.ly/1wmbsUF

Developed by: 343 Industries
Published by: Microsoft Studios