|First Appearance:||Combat Plan (flashback)|
|Armor Color(s):||Light Blue (Ice in Halo Reach) with Blue Trim|
|Occupation(s):||Blue Army Second Lieutenant|
|Weapon(s):||Sniper Rifle, DMR, Pistol|
- "Tell me how to keep this thing stable and I will!"
- —Zach offering to sacrifice himself for the team.
Second Lieutenant Zach Cravich, nicknamed Bass by his friends and teammates, is a Blue Army soldier seen in Brian's flashback. He was in a team of new officers along with John, Ashley, Colme, and Brian. When their Pelican is attacked by Red Army Falcons and Ashley is severely wounded, Zach tries to talk Ashley out of staying behind and offers to take her place, despite not knowing how to fly a Pelican. Brian is able to get Zach to bail out of the Pelican, however. After locating pieces of Colme's body, he goes with John and Brian to to the crashed Pelican to see if Ashley survived. Upon getting close to it, he is sniped in the chest by Peter Jones, who is with a couple other Red soldiers but is still a Corporal. John tells Brian to get Bass to safety, and John begins to fight his way to the Pelican, never to be seen or heard from again.