| Item Name↑ | Code Name | Version | Type | Category | Mod | |
 | Rice | RicePot | 41.1 | Food | items_food | Classic |
 | Rice Cooker | HCRicecooker | B41 Beta | Normal | Kitchen | Hydrocraft |
 | Rice Cooker with Dead Battery | HCRicecookerdead | B41 Beta | Normal | Kitchen | Hydrocraft |
 | Rice Cooker with Power | HCRicecookerpowered | B41 Beta | Drainable | Kitchen | Hydrocraft |
 | Rice Flour | HCRiceflour | B41 Beta | Drainable | Food Flour | Hydrocraft |
 | Rice Hull Charcoal | HCKuntan | B41 Beta | Normal | Firecrafting | Hydrocraft |
 | Rice Packet | HCRiceseedspacket | B41 Beta | Normal | Seeds | Hydrocraft |
 | Rice Paper | RicePaper | 41.1 | Food | items_food | Classic |
 | Rice Seeds | HCRiceseeds | B41 Beta | Normal | Seeds | Hydrocraft |
 | Rice Vinegar | RiceVinegar | 41.1 | Food | items_food | Classic |
 | Rice with Chaff | HCChaffrice | B41 Beta | Normal | Herbalism | Hydrocraft |
 | Riding Boots | Shoes_RidingBoots | 41.1 | Clothing | clothing/clothing_shoes | Classic |
 | Riding Helmet | Hat_RidingHelmet | 41.1 | Clothing | clothing/clothing_hats | Classic |
 | Ring Clamp | HCRingclamp | B41 Beta | Normal | Lab | Hydrocraft |
 | Ring Mold | HCRingmold | B41 Beta | Drainable | Pottery | Hydrocraft |
 | Ring Stand | HCRingstand | B41 Beta | Normal | Lab | Hydrocraft |
 | Ring Stand with Clamp | HCRingstandclamp | B41 Beta | Normal | Lab | Hydrocraft |
 | Riot Arm Guards | HCArmarmorriot | B41 Beta | Normal | Armor | Hydrocraft |
 | Riot Armor | HCArmorriot | B41 Beta | Normal | Armor | Hydrocraft |
 | Riot Boots | HCBootriot | B41 Beta | Clothing | Clothing | Hydrocraft |
 | Riot Gloves | HCGloveriot | B41 Beta | Normal | Armor | Hydrocraft |
 | Riot Helmet | HCHelmriot | B41 Beta | Normal | Armor | Hydrocraft |
 | Riot Helmet | Hat_RiotHelmet | 41.1 | Clothing | clothing/clothing_hats | Classic |
 | Riot Leg Guards | HCLegarmorriot | B41 Beta | Normal | Armor | Hydrocraft |
 | Riot Shield | HCShieldriot | B41 Beta | Normal | Armor | Hydrocraft |
 | Ripped Poppy Capsule | HCPoppycapsuleripped | B41 Beta | Normal | Drugs Opium | Hydrocraft |
 | Ripped Sheet with Ether | HCEthersheet | B41 Beta | Food | Medical | Hydrocraft |
 | Ripped Sheets | RippedSheets | 41.1 | Normal | items | Classic |
 | Risotto | HCRisotto | B41 Beta | Food | Food Rice | Hydrocraft |
 | Riverside Map | RiversideMap | 41.1 | Map | newitems | Classic |
 | Riverside Rangers Baseball Helmet | Hat_BaseballHelmet_Rangers | 41.1 | Clothing | clothing/clothing_hats | Classic |
 | Riverside Rangers Baseball Shirt | Shirt_Baseball_Rangers | 41.1 | Clothing | clothing/clothing_shirts | Classic |
 | Roach | HCRoach | B41 Beta | Food | Food Seafood | Hydrocraft |
 | Road Flare | HCRoadflare | B41 Beta | Normal | Lights | Hydrocraft |
 | Road Flare | HCRoadflareon | B41 Beta | Drainable | Lights | Hydrocraft |
 | Roasted Vegetables | PanFriedVegetables2 | 41.1 | Food | items_food | Classic |
 | Roasting Pan | RoastingPan | 41.1 | Normal | items | Classic |
 | Robotic Assembly Arm | HCRobotarm | B41 Beta | Normal | Robotics | Hydrocraft |
 | Robotics Textbook | HCBookrobotics | B41 Beta | Literature | Books | Hydrocraft |
 | Rock Salt | HCRocksalt | B41 Beta | Normal | Mining | Hydrocraft |
 | Rock T-Shirt | Tshirt_Rock | 41.1 | Clothing | clothing/clothing_shirts | Classic |
 | Rocket Launcher Blueprint | HCBlueprintrocketlauncher | B41 Beta | Literature | Blueprints | Hydrocraft |
 | Rocketry Textbook | HCBookrocketry | B41 Beta | Literature | Books | Hydrocraft |
 | Roll of Film | HCFilmroll | B41 Beta | Normal | Photography | Hydrocraft |
 | Roll of Paper Towels | HCPapertowelroll | B41 Beta | Normal | Kitchen | Hydrocraft |
 | Rolled Dough | DoughRolled | 41.1 | Food | items_food | Classic |
 | Roller Luggage | HCLuggage2 | B41 Beta | Container | Containers | Hydrocraft |
 | Rolling Pin | RollingPin | 41.1 | Weapon | items_weapons | Classic |
 | Root Beer Soda | HCSodarootbeer | B41 Beta | Food | Food Sodapop | Hydrocraft |
 | Rope | Rope | 41.1 | Normal | newitems | Classic |
 | Rose Gold Ingot | HCRosegoldingot | B41 Beta | Normal | Metalurgy | Hydrocraft |
 | Rose Quartz Crystal | HCQuartzrose | B41 Beta | Normal | Gems | Hydrocraft |
 | Rosebud | HCRosebud | B41 Beta | Normal | Foraging | Hydrocraft |
 | Rosehips | Rosehips | 41.1 | Food | items_food | Classic |
 | Rosemary | HCRosemary | B41 Beta | Food | Food Condiments | Hydrocraft |
| Rosewood Map | RosewoodMap | 41.1 | Map | newitems | Classic |
 | Rotini Pasta | HCPastarotini | B41 Beta | Food | Food Pasta | Hydrocraft |
 | Rotor | HCRotor | B41 Beta | Normal | Auto | Hydrocraft |
 | Rottweiler (Female) | HCRottweilerfemale | B41 Beta | Container | Dogs | Hydrocraft |
 | Rottweiler (Male) | HCRottweilermale | B41 Beta | Container | Dogs | Hydrocraft |
 | Roulette Table | HCRoulette | B41 Beta | Normal | Money | Hydrocraft |
| Roulette Table | HCRoulette2 | B41 Beta | Normal | Money | Hydrocraft |
 | Round Neck Sweater | Jumper_RoundNeck | 41.1 | Clothing | clothing/clothing_jacket | Classic |
 | Rounded Jello Mold | HCJellomold1 | B41 Beta | Normal | Kitchen | Hydrocraft |
 | Router | HCRouter | B41 Beta | Normal | Electronics | Hydrocraft |
 | Rubber | HCRubber | B41 Beta | Normal | Rubber | Hydrocraft |
 | Rubber Ball | HCRubberball | B41 Beta | Normal | Toys | Hydrocraft |
 | Rubber Band | RubberBand | 41.1 | Normal | newitems | Classic |
 | Rubber Belt | HCRubberbelt | B41 Beta | Normal | Lab | Hydrocraft |
 | Rubber Bung | HCRubberbung | B41 Beta | Normal | Lab | Hydrocraft |
 | Rubber Bung with Cables | HCDetonatorrubberbungcabels | B41 Beta | Normal | Weapons Explosives | Hydrocraft |
 | Rubber Bung with Hole | HCRubberbunghole | B41 Beta | Normal | Lab | Hydrocraft |
 | Rubber Cement | HCRubbercement | B41 Beta | Drainable | Office | Hydrocraft |
 | Rubber Duck | Rubberducky | 41.1 | Normal | newitems | Classic |
| Rubber Duck | Rubberducky2 | 41.1 | Drainable | newitems | Classic |
 | Rubber Gloves | HCRubberglove | B41 Beta | Normal | Clothing | Hydrocraft |
 | Rubber Hose | HCRubberhose | B41 Beta | Normal | Lab | Hydrocraft |
 | Rubber Raft | HCRaftrubber | B41 Beta | Normal | Camping_HC | Hydrocraft |
 | Rubber Sheet | HCRubbersheet | B41 Beta | Normal | Rubber | Hydrocraft |
 | Rubber Stamp | HCStamp | B41 Beta | Normal | Office | Hydrocraft |
 | Rubber Tree Packet | HCRubbertreeseedspacket | B41 Beta | Normal | Seeds | Hydrocraft |
 | Rubber Tree Seeds | HCRubbertreeseeds | B41 Beta | Normal | Seeds | Hydrocraft |
 | Rubber Working Textbook | HCBookrubberworking | B41 Beta | Literature | Books | Hydrocraft |
 | Ruby | HCRuby | B41 Beta | Normal | Gems | Hydrocraft |
 | Ruffe | HCRuffe | B41 Beta | Food | Food Seafood | Hydrocraft |
 | Ruler | HCRuler | B41 Beta | Normal | Office | Hydrocraft |
 | Rum | HCRum1 | B41 Beta | Food | Food Bar | Hydrocraft |
 | Rune Stone | HCRunestone | B41 Beta | Normal | Stoneworking | Hydrocraft |
 | Russian Textbook | HCBookrussian | B41 Beta | Literature | Books | Hydrocraft |
 | Rusty Bed Springs | HCBedsprings | B41 Beta | Normal | Junkyard | Hydrocraft |
 | Rusty Shards | HCRustyshards | B41 Beta | Normal | Trash | Hydrocraft |
 | Sack | SackOnions | 41.1 | Container | newBags | Classic |
| Sack | SackCarrots | 41.1 | Container | newBags | Classic |
| Sack | EmptySandbag | 41.1 | Container | newitems | Classic |
| Sack | SackCabbages | 41.1 | Container | newBags | Classic |
| Sack | SackPotatoes | 41.1 | Container | newBags | Classic |
 | Sack of Apples | SackProduce_Apple | 41.1 | Food | newitems | Classic |
| Sack of Bell Peppers | SackProduce_BellPepper | 41.1 | Food | newitems | Classic |
| Sack of Broccoli | SackProduce_Broccoli | 41.1 | Food | newitems | Classic |
| Sack of Cabbages | SackProduce_Cabbage | 41.1 | Food | newitems | Classic |
