What the title says. Non-cinematic moments. My favorite memorable moment was when entering the Didacts Cryptums hold area. The music playing in the background matched perfectly with the Elites firing FuelRods, Jackals firing away while pushing forward, and Grunts running in sheer terror before getting slain by The Prometheans. Give yours please.
Edit 19:30 April 7th: Expanded to Spartan Ops, Campaign, and Multiplayer moments.
Probably just the playthrough of the final part of Midnight.
The music fits the mood perfectly. It’s a mixture of the sadness and mourning caused by knowing Cortana is tearing herself apart and Earth suffering the Composer. It’s at the same time epic and invigorating, because it’s a rush against time, enemies, and death, and, I dunno, the tune’s cool all together!
And combined with the music, the epic battle through the grueling Promethean masses, the race against all odds, and being the last hope. It’s my favorite Halo 4 level.
Then there was the bag of nachos beside me.
Also, is this strictly campaign or can we put multiplayer moments as well?
Im assuming we can list campaign moments or multiplayer moments so… I have many memorable moments, but my most recent would have to be getting super launched in Grifball. My two other teammates launched me out of the map lol.
ComicBeast1212 beat me to it… I’m the only one I think that actually enjoyed the “final” showdown with the Didact.
I liked stepping out of the crash and seeing requiem.
Campaign: Flying around in Pelican exploring on Shutdown.
Multiplayer: Falling of Adrift twice in one game because I was lagging and the man canon didn’t shoot me the hole way.
Spartan Ops: Episode six chapter one. First person assassination again a Zealot. 
My last PP kill for weapon mastery.
Campaign:
The first part of Midnight.
Multiplayer:
My very first game of Halo 4 multiplayer. I still remember it to this day…
Spartan Ops:
Umm…
I loved the last part with the level Infinity, where you drive the scorpion into the UNSC Infinity then take control of the Mantis. Wreaking havoc with those two vehicles was awesome!
Flying a mongoose at the speed of light from one side of ragnorok to the other without touching the ground and splattering someone.
Sad part i don’t have any moments from this game besides campaign , multiplayer got a bit down for me for a while have not played the game since last friday :S
Every Halo player i knew stopped playing so get’s a bit boring.
Walking out of the dust and seeing how beautiful Requiem looks.
First time seeing the Cryptum and the ominous music playing in the background.
Playing Midnight when Arrival starts to play and I realize that Cortana will be lost. (Had seen a spoiler that she dies but didn’t believe it untill I saw it myself)
In Ragnarok I got blasted up to the sky like Team Rocket
Campaign:
Spartan Ops:
Multiplayer:
And many, many more…
There were a lot of moments in the Campaign I found just awesome, but the biggest memorable moment in Halo 4 for me is when you first see the beautiful lanscape of Requiem.
Oh man…some really great campaign moments,
I saved my first Halo 4 matchmaking game. Played like a beast on Haven, was midnight release night. Haha was so great
I didn’t like the results, but the part when Didact recovered the composer was just…really well done. The eerie music, cortana worsening, and the panic/confusion in the last cutscene of composer.
Also, the part when you step into the massive expanse in Requiem and the music starts playing…and yeah. The beginning was pretty awesome too.
Lol and playing the first mission with my brother shooting around floating grunts. Hahaha and playing LASO with my friends.
I’ve actually got quite a few memories that are great.
The excitement of new DLC (Crimson especially), augh man just a great time.
I guess there were just a lot of great campaign moments. I loved the mission with the gondola, can’t remember but it’s after reclaimer. Seeing infinity having just crashed and just how massive it is, is still stunning.
I could go on and on…probably couldn’t name a favorite part
> Oh man…some really great campaign moments,
> <mark>I saved my first Halo 4 matchmaking game. Played like a beast on Haven,</mark> was midnight release night. Haha was so great
>
> I didn’t like the results, but the part when Didact recovered the composer was just…really well done. The eerie music, cortana worsening, and the panic/confusion in the last cutscene of composer.
> Also, the part when you step into the massive expanse in Requiem and the music starts playing…and yeah. The beginning was pretty awesome too.
> Lol and playing the first mission with my brother shooting around floating grunts. Hahaha and playing LASO with my friends.
>
> I’ve actually got quite a few memories that are great.
> The excitement of new DLC (Crimson especially), augh man just a great time.
>
> I guess there were just a lot of great campaign moments. I loved the mission with the gondola, can’t remember but it’s after reclaimer. Seeing infinity having just crashed and just how massive it is, is still stunning.
> I could go on and on…probably couldn’t name a favorite part
That happened to me too when I first got Halo 4.
AW… I have to pic a favorite? LOL
My #1 favorite campain moment is towards the end of the first level, right after you launch the hyperion missile and destroy the storm covenant’s cruiser. At this moment, Cortana informs you that ‘OMG THERE IS A MYSTERIOUS AND -YOINKING- MASSIVE FORRUNNER PLANET ABOUT TO EAT WHATS LEFT OF THE DAWN!!!’ and you desperately run through the ship towards the lifeboats as the ship falls apart around you, and when you finally reach the vehicle bay, the ship disinigrates around you as UNSC/Covenant ship debri gets sucked into Requiem’s blindingly bright, gaping and omnimous maw, until a piece of flying debri knocks the Chief out, the screen goes black and simply says:
-HALO 4- !!!
My file share is too full of Multiplayer moments. All those Flood Killionares, 2 for 1 snipes, railgun crossmapping, splaser devestation, and Mantis dominations among other things have all been awesome. But I have to my most memorable moment was after getting my team demolished in a clan tournament, and then going into MM and going 42-5 in a JIPed Infinity Slayer match on Abandon, getting shotgun after shotgun in my ordinance and those noobs just blindy running into it endlessly. After the game was over everyone in the lobby simply said: ‘DAAAAAAAAAAAAANG, SMARTAN!!!’ Made me feel so much better after losing that tournament. The funny thing is, I’ve gotten about 5X better at the game since then and have never gotten such an insane slayer KD since. 
The other day I actually killed someone by using a Plasma Pistol. Not Paintball, not an AFK, not an accident. The guys shields were down, he was kinda moony and I had burned through my Suppressor magazine already so I was just like “Screw it”.
Glorious.
Campaign: The first part of Midnight while playing 4-player co-op? Complete madness.
Multiplayer: Double Kill/Hail Mary in Medal Madness!
Spartan Ops: Was playing with a friend one day when a glitch occurred in which all the Covenant shrunk down to the size of an ant! I wish I could’ve recorded it… sadly, I couldn’t. 
All the campaign parts where the Forerunner environment assembles itself, it’s really well executed in campaign. I’d like to see some of that in MM too please. You know like the Forerunner mancannons landing parts assemble as you’re in the air before landing or the gondola style level where parts of the level are shape shifting.
I’d enjoy this being taken even further or becoming interactive so you can shape new paths or time routes to coincide with such events.
The opening to Dawn, Composer and Shutdown were great levels. I’m not much for vehicle based levels, small parts of them are great but whole missions in vehicles get tiresome for me.