Overfreight research governs every major network upgrade in the Roblox railway simulation created by OneSkyVed. Progressing through the research tree requires earning stars by completing freight deliveries, paying cash or diamonds, and supplying specific cargo types to designated facilities. Completing all non-diamond research grants the completionist Overfreight! badge, unlocking the orange locomotive livery.
Overfreight Research Tree and Requirements
Research options require a specific star threshold, an upfront fee in cash or diamonds, and designated cargo deliveries before the technology finishes. Most research items persist only within the active save slot, though select diamond upgrades unlock across all save profiles.
| Research Name | Stars Required | Price | Cargo Quota Required | Effect / Unlock |
|---|---|---|---|---|
| Multiple train operation | 6 | $2,000 or 1 Diamond | 50t Logs | Unlocks signaling tool to run multiple trains without collisions |
| Marker path | 10 | $3,000 or 3 Diamonds | 200t Wooden Planks | Allows route planning without purchasing real rails |
| Longer trains 1 | 22 | Available in game | Available in game | Increases maximum train length to 6 cars |
| More platforms 1 | 26 | Available in game | 500t Furniture | Increases industry platform capacity to 4 |
| More platforms 2 | 32 | $170,000 or 35 Diamonds | Sand | Increases industry platform capacity to 8 |
| Longer trains 2 | 36 | $250,000 | 2,000t Coal, 4,000t Sand | Increases train length to 11 cars |
| Much longer trains 1 | 36 | 140 Diamonds | None | Unlocks longer train limits across all save slots |
| Much longer trains 2 | 36 | 140 Diamonds | None | Unlocks extended train limits across all save slots |
| Faster diesel locomotives | 50 | Available in game | 3,500t Coal | Unlocks upgraded diesel locomotives |
| Even better rails | 60 | $250,000 or 45 Diamonds | 4,000t Sand, 4,000t Coal | Unlocks Generic Rails (160 km/h speed limit) |
| Connecting locomotives | 70 | Available in game | Glass panes (in-game quota) | Permits running an extra locomotive per train |
| Electric locomotives | 80 | $300,000 or 50 Diamonds | 2,500t Glass panes, 2,500t Copper ingots | Unlocks electric locomotives (120 km/h speed limit) |
| Removal of freight train speed limit | 130 | Available in game | 2,000t Steel beams | Raises electric locomotive maximum speed to 140 km/h |
| Industry bribery | 140 | Available in game | Raw copper | Allows direct financing of industry upgrades |
| Emergency brake abuse | Unspecified in data | $1,200,000 or 35 Diamonds | 1,000 Passengers, 2,000t Iron ingots | Accelerates train stopping at station platforms |
| Faster electric locomotives | 180 | $6,000,000 or 80 Diamonds | 500t Electronics, 1,000t Steel beams | Unlocks high-speed electric locomotive (320 km/h) |
How the Research Loop Works
Unlocking technological upgrades follows a strict progression cycle tied to your network's logistics.
- Deliver cargo along active supply lines to earn stars (reputation) and build your cash balance.
- Select an available node in the research menu once you meet the star requirement.
- Pay the required starting fee in cash or diamonds.
- Haul the required cargo quotas to the destination facilities to finish the research.
If a train fails to advance the delivery counter, check for a "no path found" error or misconfigured track signaling. Automated routes may struggle at complex junctions, so switching to manual route assignments helps direct cargo to the exact industries demanding the research materials.
Cargo Chains Required for Research Progression
Research projects demand increasingly advanced commodities. Raw resources cannot bypass intermediate processing plants; attempting an improper delivery will flag the route as invalid.
- Timber Line: Raw logs from Deforestation Volunteers go to the shaping facility to produce wooden planks, which then feed the product assembly plant for furniture.
- Glass Line: Sand and coal must be delivered together to the glass pane facility to produce glass panes.
- Metal Processing: Raw iron ore must be refined into iron ingots at the iron smelter before being paired with coal at a steel mill to create steel beams. Delivering raw iron directly to a steel mill results in the Logistical Nightmares badge and fails to yield goods.
- Copper and Electronics: Raw copper from the copper mine combines with coal at the copper plant to forge copper ingots. Later high-tier research requires combining copper ingots, sand, and iron ingots at the electronics plant to manufacture electronics.
Diamond Research vs. Reputation Research
The research menu features two distinct funding paths: cash earned through reputation deliveries and diamonds.
Diamonds can be acquired using Robux, through player-to-player gifting, by watching in-game ads (granting 5 gems per ad), or by completing daily tasks (granting 10 gems per task). While diamond-exclusive nodes like Much Longer Trains 1 and 2 persist across all save files, they are completely optional for completing the main tech tree. The Overfreight! badge specifically excludes diamond-gated projects, allowing career-mode players to finish all core research without spending real money.
Research Badges and Milestone Rewards
Completing key nodes inside the research system triggers specific game badges and exclusive fleet rewards.
- Overfreight! Badge: Unlocked when every non-diamond research project is completed. Awarding this badge transforms all default locomotive liveries across your fleet into an orange color scheme.
- A Nice Gift Badge: Unlocked upon finishing the Electric Locomotives research node in a standard Career mode save. This reward grants four rare, rusty locomotives with an 80 km/h top speed. These locomotives cannot be modified, repainted, or repurchased if sold.
- Logistical Nightmares Badge: Earned as a failsafe when a player accidentally sets up an invalid manual route attempting to deliver raw iron directly into a steel mill.
Frequently Asked Questions
Do I need diamonds to complete all research in Overfreight?
No. The core progression badge, Overfreight!, requires only non-diamond research nodes. You can unlock the full essential tech tree strictly by earning stars and spending cash generated from regular deliveries.
Why does my train show "No Path Found" during a research delivery?
This error occurs when track sections are missing, switches are aligned against the train, or signals face the wrong direction. Connecting the destination industry properly or setting a manual route from the loading industry directly to the unloading platform resolves the error.
What do you receive for unlocking electric locomotives?
Unlocking the Electric Locomotives research in Career mode awards the "A nice gift" badge along with four unique rusty locomotives. It also permits your rail network to build electrified rail tracks and deploy standard 120 km/h electric engines.
Does research progress carry over to new save slots?
Standard research funded with cash and reputation resets when starting a new save file. Only specific diamond-tier research, such as Much Longer Trains 1 and 2, remains unlocked across every save slot on your profile.
