Inferno mode is something akin to Hardcore mode, check out some of the differences from the regular crucible game play.
click the link for more details https://www.bungie.net/en/News/News?aid=12714
- No Tracker
- Players have no “radar” in the top left corner of their HUD
- Super Good Advice: Please, please check your corners, Guardians
- Simplified Scoring
- We've removed as many scoring events as possible
- The mode is solely about getting kills
- Assists are good for team-play but don’t net any points
- Less Heavy Ammo
- There’s only one set of Heavy crates per match
- With no Tracker, it’s much easier to flank an aggressive opponent that’s pushing for kills because they have Heavy
- Expect players to play more conservatively with Heavy ammo to try and get more bang for the buck
click the link for more details https://www.bungie.net/en/News/News?aid=12714