| Item Name↑ | Code Name | Version | Type | Category | Mod | |
 | Mining Drill with Power | HCMiningdrillpowered | B41 Beta | Drainable | Tools | Hydrocraft |
 | Mining Grinder | HCMininggrinder | B41 Beta | Normal | Tools | Hydrocraft |
 | Mining Grinder with Power | HCMininggrinderpowered | B41 Beta | Drainable | Tools | Hydrocraft |
 | Mining Helmet | Hat_HardHat_Miner | 41.1 | Clothing | clothing/clothing_hats | Classic |
 | Mint Candy | MintCandy | B41 Beta | Food | items_food | Hydrocraft |
 | Mirror | Mirror | 41.1 | Normal | newitems | Classic |
 | Mittens | HCMittens | B41 Beta | Normal | Tailoring | Hydrocraft |
 | Mixed Candy | HCCandymixed | B41 Beta | Food | Food Candy | Hydrocraft |
 | Mocha Cruller | HCCruller3 | B41 Beta | Food | Food Donuts | Hydrocraft |
 | Modjeska | Modjeska | 41.1 | Food | items_food | Classic |
 | Mole Cricket | HCMolecricket | B41 Beta | Food | Bugs | Hydrocraft |
 | Molotov Cocktail | Molotov | 41.1 | Weapon | items_weapons | Classic |
 | Momigalite | HCMomigalite | B41 Beta | Normal | Firecrafting | Hydrocraft |
 | Monarch Butterfly | HCMonarch | B41 Beta | Normal | Bugs | Hydrocraft |
 | Money | Money | 41.1 | Normal | newitems | Classic |
 | Monkey Tail Mug | HCColademonomug | B41 Beta | Food | Food Bar | Hydrocraft |
 | Monkey Tail Pot | HCColademonopot | B41 Beta | Food | Food Bar | Hydrocraft |
 | Monkey Wrench | HCMonkeywrench | B41 Beta | Weapon | Tools | Hydrocraft |
 | Mop | Mop | 41.1 | Normal | newitems | Classic |
 | Morning Glory | HCMorningglory | B41 Beta | Normal | Foraging | Hydrocraft |
 | Mortar | HCMortar | B41 Beta | Normal | Stoneworking | Hydrocraft |
 | Mortar and Pestle | MortarPestle | 41.1 | Normal | newitems | Classic |
 | Mothballs | HCMothballs | B41 Beta | Normal | Cleaning | Hydrocraft |
 | Motion Sensor | MotionSensor | 41.1 | Normal | newitems | Classic |
 | Motor Oil | HCMotoroil | B41 Beta | Drainable | Auto | Hydrocraft |
 | Motorcycle | HCMotorcycle | B41 Beta | Container | Auto | Hydrocraft |
 | Motorcycle Helmet | HCHelmmotorcycle | B41 Beta | Normal | Armor | Hydrocraft |
 | Motorcycle Helmet | Hat_CrashHelmetFULL | 41.1 | Clothing | clothing/clothing_hats | Classic |
 | Mouse Pad | HCMousepad | B41 Beta | Normal | Electronics | Hydrocraft |
 | Mouse Trap | TrapMouse | 41.1 | Normal | newitems | Classic |
 | Mousetrap Blueprint | HCBlueprintmousetrap | B41 Beta | Literature | Blueprints | Hydrocraft |
 | Mouthwash | HCMouthwash | B41 Beta | Food | Bathroom | Hydrocraft |
 | Mouthwash | HCMouthwash2 | B41 Beta | Food | Bathroom | Hydrocraft |
| Moveable | Moveable | 41.1 | Moveable | moveables | Classic |
| Moveable | Mov_Lamp1 | 41.1 | Moveable | newitems | Classic |
| Moveable | Mov_Lamp2 | 41.1 | Moveable | newitems | Classic |
| Moveable | Mov_Lamp3 | 41.1 | Moveable | newitems | Classic |
| Moveable | Mov_Lamp4 | 41.1 | Moveable | newitems | Classic |
| Moveable | Mov_Lamp5 | 41.1 | Moveable | newitems | Classic |
| Moveable | Mov_Lamp6 | 41.1 | Moveable | newitems | Classic |
| Moveable | Mov_Toaster | 41.1 | Moveable | newitems | Classic |
| Moveable | Mov_Microwave | 41.1 | Moveable | newitems | Classic |
| Moveable | Mov_Microwave2 | 41.1 | Moveable | newitems | Classic |
| Moveable | Mov_AntiqueStove | 41.1 | Moveable | newitems | Classic |
 | Movie Film Can | HCFilmcan | B41 Beta | Normal | Cinema | Hydrocraft |
 | Movie Film Roll | HCMovieroll | B41 Beta | Normal | Cinema | Hydrocraft |
 | Movie Projector | HCProjector | B41 Beta | Normal | Cinema | Hydrocraft |
 | Moving Sensor Platine | HCPlatinemovingsensor | B41 Beta | Normal | Electronics | Hydrocraft |
 | MRE | HCMRE | B41 Beta | Food | Food MRE | Hydrocraft |
 | MRE Apple Sauce Pouch | HCMREmealsideprepedA | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Beef Stew | HCMREmealprepedG | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Chicken Stew | HCMREmealprepedC | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Chicken w/Rice | HCMREmealprepedJ | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Chocolate Covered Brownie | HCMREmealsideprepedG | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Chocolate Covered Cookie | HCMREmealsideprepedF | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Chow Mein Noodles | HCMREmealsideprepedD | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Corned Beef Hash | HCMREmealprepedB | B41 Beta | Food | Food MRE | Hydrocraft |
 | MRE Crackers | HCMREcrackers | B41 Beta | Food | Food MRE | Hydrocraft |
 | MRE Drink Packet | HCMREdrinkpacket | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Escalloped Potatoes w/Ham | HCMREmealprepedK | B41 Beta | Food | Food MRE | Hydrocraft |
 | MRE Meal | HCMREmeal | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Omelet with Ham | HCMREmealprepedD | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Pork Chow Mein | HCMREmealprepedH | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Pork w/Rice in BBQ Sauce | HCMREmealprepedA | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Potato Sticks | HCMREmealsideprepedH | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Potatoes Au Gratin | HCMREmealsideprepedC | B41 Beta | Food | Food MRE | Hydrocraft |
 | MRE Pound Cake | HCMREpoundcake | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Pound Cake | HCMREmealsideprepedE | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Rehydrated Fruit Pouch | HCMREmealsideprepedB | B41 Beta | Food | Food MRE | Hydrocraft |
 | MRE Side Meal | HCMREmealside | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Smoky Franks | HCMREmealprepedF | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Snack Bread | HCMREbread | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Spaghetti w/ Meat Sauce | HCMREmealprepedE | B41 Beta | Food | Food MRE | Hydrocraft |
| MRE Tuna w/Noodles | HCMREmealprepedI | B41 Beta | Food | Food MRE | Hydrocraft |
 | MSR700 Rifle | VarmintRifle | 41.1 | Weapon | items_weapons | Classic |
 | MSR788 Rifle | HuntingRifle | 41.1 | Weapon | items_weapons | Classic |
 | Muffin | MuffinGeneric | 41.1 | Food | items_food | Classic |
 | Muffin Baking Tray | BakingTray_Muffin | 41.1 | Food | items_food | Classic |
| Muffin Baking Tray | BakingTray_Muffin_Recipe | 41.1 | Food | items_food | Classic |
 | Muffin Pan | HCMuffinpan | B41 Beta | Normal | Kitchen | Hydrocraft |
 | Muffin Tray | MuffinTray | 41.1 | Normal | newitems | Classic |
 | Mug of Tar | HCTarmug | B41 Beta | Drainable | Firecrafting | Hydrocraft |
 | Mug of Water | WaterMug | 41.1 | Drainable | items_food | Classic |
 | Mug of Water | WaterMugRed | 41.1 | Drainable | items_food | Classic |
 | Mug of Water | WaterMugWhite | 41.1 | Drainable | items_food | Classic |
 | Mug of Water | WaterMugSpiffo | 41.1 | Drainable | items_food | Classic |
 | Mulberry | HCMulberry | B41 Beta | Food | Herbalism | Hydrocraft |
 | Mulberry Leaf | HCMulberryleaf | B41 Beta | Normal | Herbalism | Hydrocraft |
 | Mulberry Packet | HCMulberryseedspacket | B41 Beta | Normal | Seeds | Hydrocraft |
 | Mulberry Seeds | HCMulberryseeds | B41 Beta | Normal | Seeds | Hydrocraft |
 | Muldraugh Map | MuldraughMap | 41.1 | Map | newitems | Classic |
 | Mulling Spice | HCMullingspice | B41 Beta | Food | Food Condiments | Hydrocraft |
 | Multitool Drill Head | HCElectricmultitooldrillhead | B41 Beta | Normal | Tools | Hydrocraft |
 | Multitool Saw | HCElectricmultitoolsaw | B41 Beta | Normal | Tools | Hydrocraft |
 | Multitool With Drill | HCElectricmultitooldrilloff | B41 Beta | Normal | Tools | Hydrocraft |
 | Multitool With Saw | HCElectricmultitoolsawoff | B41 Beta | Normal | Tools | Hydrocraft |
 | Mushrooms | MushroomGeneric1 | 41.1 | Food | items_food | Classic |
 | Mushrooms | MushroomGeneric2 | 41.1 | Food | items_food | Classic |
 | Mushrooms | MushroomGeneric3 | 41.1 | Food | items_food | Classic |
 | Mushrooms | MushroomGeneric4 | 41.1 | Food | items_food | Classic |
