Note: These ideas are ones I have thought about and want to know what other people think of them.
A campaign mod that makes Sgt. Johnson invincible, as he is important in the plot for Halo 2.

Maybe a campaign mod where you play as a marine instead of Master Chief.

Include Drones as an enemy in the campaign or sniper Jackals.

This post will be edited as I come up with more ideas.

There are plenty of those already on the site. These ideas are mostly Campaign ideas right now I was thinking about what might enhance the single player experience.

a kind of weapon like reach to call an airstrike? but in halo.. not Cod or so mod...
time sniper, u shot and do little damage but in 5 seconds it will detonate
play as the monitor (343) and have a kickass beam
Edited by WM Blade on Aug 21, 2010 at 08:01 PM

grunt that pees when u awake him hahahahaha

I also have thought about a campaign with elites on your side, and brutes replacing the elites' place in the Covenant.

You're the one with those animations >>

U FAIL AT SARCASM DETECTION.

That was Bungie's idea... so were the others.
Plus the quoted idea is extremely lame. You can see it in Halo 3's and ODST's campaigns,

Even so, there arent maps with Halo 3 styled Campaign(Elites and humans vs The rest of the Covenant)

You can't detect sarcasm when you read it, I'm sick of people being "sarcastic" on the internet, it's really annoying.

a mod when Sgt. Johnson won't die....something something something then save teh johnson!
Edited by dood on Sep 10, 2010 at 10:45 AM

SGT Johnson actually doesn't have to die you know. However, you can't take him with you either, so I guess he would end up dying anyway. :P

How about a small foot map, melee kills only, but - you also script bump possession? So for example, if set to race/slayer, if you are last, the way to win is either to melee kill everyone, and catch up - OR - to bump possession with the person in first place, now their score becomes yours and you are now in first place? is this possible without an additional ap?

a mod when you are Staff Sergeant Avery Johnson on planet Harvest (first planet attacked by Covenant)

Johnson and his squad of militia are heavily out-manned and out-gunned. Maccabeus is ordered to "glass" the planet from space, but disobeys and launches a ground assault in an effort to recover the "relics". The human militia tries to keep the aliens busy while evacuating the civilians from the planet; this requires Johnson and his team to board an orbital platform controlled by Dadab and his troops. Tartarus challenges Maccabeus for control of the Jiralhanae pack, killing his uncle and becoming the next leader. Lighter than Some is killed by Tartarus' troops, and Dadab goes off to kill those he believes are responsible. As his weapon only has one more shot left, Dadab searches for Tartarus, who is fighting Johnson. Dadab destroys Tartarus' shield, and the enraged Brute kills the deacon. Wallace Jenkins, a young militia member that has lost his family in the battle, attempts to kill Tartarus alone, but the alien escapes. The human civilians and survivors of Harvest evacuate the planet on hundreds of freighters. On High Charity, the Minister of Fortitude, Tranquility, and The Philologist become the new Prophet Hierarchs. They take the names Truth, Regret, and Mercy, declaring a new age for the Covenant has begun, and that the humans must be annihilated for their crimes.

this history has retrived by halo book (contact Harvest) more info here:
http://en.wikipedia.org/wiki/Halo:_Contact_Harvest

Cool story bro, but one question: what does the map look like?

Fields and Spaceships man, Fields and Spaceships.