I need some help unlocking an armor piece!

Hello there,

I recently started playing Halo: Reach again,
and while playing, there suddenly came this question that I couldn’t answer.

That question in fact was ‘how do I unlock this robotic arm and/or (r)-chestpiece?

I’m sort of new to Halo’s unlocking system, as I never really cared about them and just wanted to experience the story. (I love to read the novels.)

Help is appreciated!

  • Thanks for reading

you need to be lt colonol and have credits