The fastest way to level up in Halo Reach, or any other future MCC title, is by playing multiplayer. ... Firefight does provide some XP but multiplayer is currently the fastest way to gain levels. You can gain up to 100 Season Points from your first 100 rank increases. Leveling up beyond that will give you no rewards.

What gives the most XP in MCC?

Currently, there are two modes the community agrees are the best ways to load up on XP — Grifball and Firefight. Grifball: The best versus mode for XP. Matches are over very quickly — a typical game can earn any player 12k XP in about 8 minutes.

Does solo firefight give XP?

Halo: The Master Chief Collection

I noticed earlier that if you play firefight solo, you don't get exp towards your rank afterwards. If you play it with people online, though, you do get exp. If I remember correctly, you would still get exp for playing solo in the original game.