Mods / Halo3

• GGashnor's Cursed Halo 3 v6.1.1 - THE RANDOMIZER UPDATEby GashnorNOTE: IF PLAYING CO-OP, VERIFY ALL PLAYERS SEE v6.1.1! IT WILL CRASH OTHERWISE Welcome to Gashnor's Cursed Halo 3! An original taking on the "Cursed" genre for Halo 3's campaign, now fully overhauled to 6.1 in celebration of this mod hitting 100,000 active subscribers! A chaotic and funny experie...153.1k downloadsupdated 6 mo ago
• UUltimate Firefight Series (Updated 18th October 2026)by weaver900Created by Weaver900- New SPV3-Inspired Roguelite Co-Op Firefight mode for Halo 3 I accidentally nuked this description because I suck... I've been really busy lately but will try to restore it soon! To start this mod please go to the campaign menu, Halo 3, then select Ultimate Firefight Sandtrap...127.2k downloadsupdated 17 d ago
• HHugegrassby RejectedShotgunHugegrass: Reclaimer is an update to Hugegrass with many new reworks, balance changes, new vehicles, new weapons, expanded Forge, improved visuals, and much more designed specifically to be played on Project Reclaimer with many more vehicle spawns, weapon spawns, and much more. Halo 3: Hugegrass...85.3k downloadsupdated 22 d ago
• UUltimate Forge 2.0by RejectedShotgunUltimate Forge V2 is a complete re-imagining of what Halo 3's Forge can be and a complete overhaul of the original mod. Now featuring 10 maps with unique sets of terrain, nature, and structure objects for each map along with massive-scale modded vehicles, weapons, and AI spawners. Version 2.0 Rel...75.8k downloadsupdated 7 mo ago
• HHalo 3 Mythic Overhaul Campaign 2.0by MythicJaquiThis mod is a complete sandbox overhaul for Halo 3. The goal of the mod is to expand the sandbox and provide more gameplay variety for halo 3. You'll find new weapons and vehicles, run into new encounters and enemies, and experience a fresh take on halo 3. Socials Twitter - YouTube - Twitch - Con...66.7k downloadsupdated 16 d ago
• HHalocraftby InfernoPlusA multiplayer map pack of 4 destructible Minecraft maps.55.0k downloadsupdated 20 mo ago
• PPimps at Seaby InfernoPlusSail the high seas on the crew of the great Captain Johnson.48.4k downloadsupdated 20 mo ago
• TThe Battlefront Pack - Halo 3by 76561199059205394The Battlefront Pack - Halo 3 Mod Created by abyssquick , and stevierothy Contributors Surestsafe Ctrl-Alt-Destroy NotEnderr Semmehh Cover Art MrGruntington Maps Included Hoth Geonosis Death Star Mustafar Coruscant Kashyyyk Mos Eisley Scarif Utapau Armor Customization Cheat Sheet Notice: Only App...41.9k downloadsupdated 8 d ago
• PPermafrostby RejectedShotgunPvPvE for 16 players & 20+ AI Permafrost is intended for 12-16 players. The map currently supports ALL GAMEMODES! Official Release - 9/24/26 Official 1.0 Release! New shaders, courtesy of Zoephie. Improve Frigate visuals. Many bug fixes. Permafrost New Features Red & Blue Team AI Team Resource Ca...35.1k downloadsupdated 1 mo ago
• HHalo Online Map Pack For Halo 3by General HeedAll the remaining and never before seen Halo Online maps are now avaialble for Halo 3 on MCC with this convenient mod pack! This map pack includes: Diamondback Lockout Reactor Powerhouse Sky Bridge The maps are as original as possible from the tags but a couple small additions were made such as a...33.7k downloadsupdated 2 y ago
• KKillamanjaro AI Warby RejectedShotgunKillamanjaro & Ark AI War A never-ending war set on Earth near the recently uncovered Ark portal. Covenant forces will resupply endlessly with many unique encounters such as Scarabs, Covenant Cruisers, and modded AI like the Locust. This map is intended to be played in Forge by yourself. Multiple...30.4k downloadsupdated 20 mo ago
• HHalo 3 Multiplayer Characters In Campaignby General HeedThis mod lets you use your multiplayer spartan or elite as well as your weapon & vehicle skins in the campaign of Halo 3 on MCC. It allows you to use the MCC customization menu to make changes to your multiplayer biped which will then be applied on the fly in campaign. No need to manually adjust...21.2k downloadsupdated 3 y ago
• HHalo 3: Trooperby DrearyMussell5Play through Halo 3's campign in third person as a human ODST. Fair warning, these aren't the super humans of Halo 3: ODST or the classic Spartans of the triology. You will be playing as a standard, non main character human and your survival is in no way guaranteed. This is best played on Heroic...20.0k downloadsupdated 14 mo ago
• HHalo 3: Yet Another Marine Campaignby 76561199016386946The ultimate Halo 3 Marine Campaign. Mild epilepsy warning. Play as a marine from Sierra 117 to Floodgate. Play as an ODST from The Ark to Halo. Fight alongside an AI Masterchief, with competent allies you WILL rely on to survive. This isn't just a biped swap, its a full game overhaul. This mod i...19.2k downloadsupdated 14 mo ago
• Ffloodgate - Campaign Forgeby 76561198417014698forge for the campaign mission "floodgate" forge in campaign for halo 3, but only for The Covenant IMPORTANT to play on UNSC team, be on green team. player can use elites, but they don't have all animations, so they hold some weapons incorrectly and can't use some vehicles at all. Key Combos mele...15.5k downloadsupdated 3 y ago
• RResurrection Revampby FunnyAnywayI now have a Patreon! Check out the latest version of this mod here! FIXED FOR September MCC UPDATE An enormous campaign overhaul for halo 3 adding new weapons, encounters, characters, vehicles, animations, mechanics, balancing, and a whole lot more. Making halo 3 feel like a brand new enhanced g...15.3k downloadsupdated 14 mo ago
• HHigh Ground Endless AI Battleby Joeber17NEW: RELEASED AI Battle for use in FORGE! Be sure to start as blue team to be on the UNSC, or orange to be on the Banished! This Halo 3 mod is an endless AI battle. As that implies, the AI will fight indefinitely until you as the player go and open the gate, indicating the end of the fight. It fe...12.8k downloadsupdated 13 mo ago
• OOverpassby RejectedShotgunOverpass is a large-scale BTB map with dropships and new vehicles from Halo 2. The map plays well on all gamemodes and is recommended to have at least 6 players. New Update 7/21/23 Major upgrades to Phantom & Pelican Added custom sounds to Spectre & Shadow Upgraded to the new MCC version Halo 3:...11.9k downloadsupdated 20 mo ago
• KKat's Halo 3 Campaignby KatherlynOh, another one of those "Rebalance" mods. This mod does not add any and everything from every Halo game. Instead it focuses on "improving" (in my opinion of course), the base game. Meant to be played on Heroic. General: -Increased player health and shields -Carry more ammo for all weapons and gr...11.6k downloadsupdated 1 mo ago
• EExtraction Point - Custom Campaign Missionby SkorlyThe Master Chief has to get to Extraction Point. It's a long walk, and the Brutes aren't going to make this easy for him. Luckily he has help from his ODST buddies. This map uses custom textures made by The Grim Dealer. They're great, and I would recommend them to anyone making a custom Halo map....11.3k downloadsupdated 3 y ago
• TThe Golden City - Custom Campaign Missionby SkorlyThe UNSC is ambushed by a Covenant fleet. The Master Chief has crashed on a mysteries planet. Can he turn on the AA defenses before Johnson and co get decimated? This missions also features re-balanced a sandbox and AI. Non of the weapons are changed majorly, and still fill their original purpose...11.2k downloadsupdated 3 y ago
• HHalo 3 Valhalla Endless AI Battleby 76561198381261086A Halo 3 modded map with endless AI battles in the multiplayer map Valhalla. Join the UNSC and fight against hordes of Covenant forces, or join the ranks of the Covenant and try to defend from the invaders in this large battle of attrition. Features: - Endless AI battle utilizing objectives syste...10.9k downloadsupdated 20 mo ago
• SSaving Sergeant Johnson - Custom Campaign Missionby SkorlySaving Sergeant Johnson is a fully custom Halo 3 mission in which you have to ,well... Save Sergeant Johnson. He is held in an old warehouse, now converted into a Brute Outpost. I don't think they have much reserve food there, so you better get there before the Brutes figure out they're not getti...10.7k downloadsupdated 3 y ago
• HHalo 3 XLby ShadowedHalo 3 campaign with hordes of AI for large battles and challenging coop. AI changes: - 4x more AI when allowed. - AI will provide suppressing fire at extreme ranges with their weapons. - Can trade weapons with the Arbiter. - Marines and Friendly Elites get a small health buff. - Hunters get a sm...10.5k downloadsupdated 14 mo ago
• HHalo 3 Main Menuby 76561198330463364Original Halo 3 Main Menu in high quality with music. Includes all music tracks from the original menu. How to use: Open MCC settings -> Video -> Configure Backgrounds -> Main Menu Background (or any background) and select Halo 3 Main Menu from the bottom of the list and save. With the new MCC up...10.4k downloadsupdated 3 y ago
• GGashnor's Cursed Halo 3 Multiplayer 0.3.1by GashnorSupport for Last Resort, Sandbox, and Avalanche currently. Will update to more maps over time now that things are more stabilized.9.8k downloadsupdated 10 d ago
• HHalo 3 Infiniteby 76561198453476710Check the change log page for update content. 看改动说明来了解更新内容。 Halo 3 Infinite Edition. Every weapon have their compatible first person animations, both spartan and elite. I've spent ages to make these fp animations. Sandbox get revamped as well. Weapons, vehicles, AI behaviours, equipments, etc. I...9.6k downloadsupdated 13 mo ago
• VValhalla AI Battlegroundby 76561199260656619VALHALLA AI BATTLEGROUND Have you ever wanted to fight alongside brutes? or perhaps join the flood? or just have every faction battle it out in a FFA? well this is the mod for you! this includes all the AI from Campaign that you can spawn right through the forge menu! now with pathfinding. **You...9.6k downloadsupdated 9 mo ago
• HHalo 3 Campaign Backgroundby 76561198330463364Original Halo 3 Campaign Menu Background for MCC. How to use: Open MCC settings -> Video -> Configure Backgrounds -> Halo 3 Background (or any background) and select Halo 3 Campaign from the bottom of the list and save. This option replaces Campaign, Custom Games and Forge menu backgrounds for Ha...9.5k downloadsupdated 3 y ago
• [[H3] Digsite Halo 3 Collectionby KrevilA collection of maps from early Halo 3 and Reach development. Special thanks to Bungie, Gearbox Software, 343i, and the rest of the Digsite team for making this possible.9.2k downloadsupdated 14 mo ago
• HHalo 3 Exalted Map Packby ShmeeGrimA collection of Halo 3 Multiplayer maps created by myself, and in collaboration with others. MAPS INCLUDED: Abyss Arrival (Work in Progress) Conflux Epirus (Work in Progress) Goliath Homefront CREDITS: ShmeeGrim/The Grim Dealer - Level Design (Conflux/Homefront/Epirus) - Environment Art (All Maps...9.1k downloadsupdated 3 mo ago
• HHalo 3 Reimaginingby [-:-]HarbingerFinish the Fight in new ways unseen.. A Halo 3 Campaign Modification dedicated to enhancing the Halo 3 experience with new enemies to challenge you and new weapons to use. This mod was at first just a test to see how Sapien works with modifying a campaign map, then it slowly turned into this proj...8.9k downloadsupdated 13 mo ago
• HHuge High Groundby MattyoversHigh Ground is a very nostalgic map as it was the first map I played on Halo 3 on the Halo 3 Beta, so it felt right to give this map a mod. I've always believed that High Ground would be a good BTB map with a separate base, and this mod accomplishes that. Instead of a single base, there are two b...8.7k downloadsupdated 19 mo ago
• TTex Arenaby DrksteelThis Mod is an homage to Red vs Blue, Relive one of the most famous moments in the entire show, the epic beatdown of the Reds (and blue) with an equally epic showdown. Deep within the Jungle, in the secret Project Freelancer Offsite Storage facility. This mod works, and encourages Co-op mode. The...8.7k downloadsupdated 20 mo ago
• HHalo 3: Lore Accurate Editionby orangastangPlay through Halo 3 with lore accurate weapon damage and health + a few extras. Heroic is recommended but don't be afraid to drop difficulty if too hard. You won't miss anything. Recommended Difficulty Recommend Heroic (Normal is lore accurate damage but is too easy in my opinion) Difficulty Tuni...8.6k downloadsupdated 8 mo ago
• FFrozen Frontier - Custom Campaign Missionby SkorlyThe Covenant have taken control of a VERY strategically important barren wasteland. They shot down the Master Chief's Pelican. Something they'll soon regret, regret, regret! This missions also features re-balanced a sandbox and AI. Non of the weapons are changed majorly, and still fill their orig...8.6k downloadsupdated 3 y ago
• FFloodhalla - A Halo 3 AI Warby III AVIATOR III“During the Battle of The Ark, the Gravemind teleports and crash lands the remnants of High Charity on the installation in an attempt to stop the Prophet of Truth from activating the rings. A large chunk of the station containing Flood has landed near a familiar, curious gorge. UNSC and Elite for...8.4k downloadsupdated 14 mo ago
• FFNaF 1 Pizzeriaby Glitch5970FNaF 1 Pizzeria map ported to Halo 3! (Freddy Fazbear is used as the custom playermodel!) All assets / textures created by me, for older FNaF fan projects of mine! (Except the Paper drawings & the animatronic models, the animatronics were made by Rynfox) Some of my assets are available to use her...7.8k downloadsupdated 3 y ago
• RResuscitation AI Battlefield | Endless Halo 3 AI Warby III AVIATOR III“The Covenant and UNSC are heading out for a major conflict in a familiar gulch. Brace for carnage. Choose your side, select your tactic, and take the fight to the enemy! My addictive AI war sandbox from Halo 2 - reimagined and expanded with the power of Halo 3!” *Mod updated to be compatible wit...7.7k downloadsupdated 3 mo ago
• SStandoff AI Battlefield | Endless AI Warby III AVIATOR IIIMy next modded map is now complete! If you like AI war maps, this one is definitely for you and a must try. The Covenant are attacking a UNSC missile launch site during their invasion of Earth, and groups of Marines, ODST’s, and even Spartans are on their way to help repel the trespassers. This m...7.6k downloadsupdated 3 mo ago
• IInstallation 00by NaughtyScottyA battle to take the beach at an unknown Covenant outpost lead to you being injured and collapsing. You awake to the sound of your radio; you hear that the beach has been successfully cleared and emerge to find your team. As a high ranking Elite Commander you are trusted to lead when needed. The...7.5k downloadsupdated 13 mo ago
• TThe Ark - Campaign Forgeby 76561198417014698forge in campaign for halo 3, but only for The Ark IMPORTANT to play on UNSC team, be on green team. player can use elites, but they don't have all animations, so they hold some weapons incorrectly and can't use some vehicles at all. Key Combos melee + zoom = ai ignore player melee + jump + grena...7.3k downloadsupdated 2 y ago
• AAvalanche AI Battlegroundby 76561199260656619AVALANCHE AI BATTLEGROUND Have you ever wanted to fight alongside brutes? or perhaps join the flood? or just have every faction battle it out in a FFA? well this is the mod for you! this includes all the AI from Campaign that you can spawn right through the forge menu! now with pathfinding. **You...7.3k downloadsupdated 9 mo ago
• HHalo 3 457's campaign overhaulby PotterHaloThis is a new Halo 3 campaign with more variety of weapons, vehicles, NPCs, improvements, etc.7.3k downloadsupdated 14 mo ago
• SSandtrap AI Battlefield | Endless AI Warby III AVIATOR III”The multiplayer match has ended. Dusk is setting in on Sandtrap, with the sandstorm dying down, and the blazing hot temperatures of the afternoon letting up for the evening. Little do the remnants know that Sandtrap about to heat up in an entirely new way. A Covenant Battle Cruiser has just ente...7.0k downloadsupdated 14 mo ago
• KKill Billus - Custom Campaign Missionby SkorlyChieftain Billus has taken control of the Super Secret Canyon Base(tm)! The UNSC has sent none other than The Master Chief to take care of it. This missions also features re-balanced a sandbox and AI. Non of the weapons are changed majorly, and still fill their original purpose. They're just gene...7.0k downloadsupdated 3 y ago
• HHalo 3 (ODST)by greenodstThe ODST that could. Play through the campaign as ODST now with dual wielding and more!7.0k downloadsupdated 14 mo ago
• DDiamondback AI Battlefield | Endless AI Warby III AVIATOR IIIWith the release of more maps for Halo 3 in the mod tools, I couldn’t resist picking out Diamondback and creating a fun AI war with it! I do apologize for the reduced amount of mods as of late, but I can assure you this one was definitely worth the wait. UNSC and Covenant forces are engaged in an...6.9k downloadsupdated 14 mo ago

409 halo3 mods, most downloaded first. Each one has its own page here with what it needs to run and where its author publishes it; the files themselves stay with the author and are never re-hosted on this site.