Mini War Roblox Factories Tier List
By Jim Liu · Mini War Roblox Guide · Tested May 2026 · ~20 hours of factory benchmarks
All 8 factory types ranked by output/hour, build cost, unlock level, terrain requirements, and synergy bonuses. This page focuses specifically on factories — for the full building rankings including non-factory structures, see the Building Tier List. For build order recommendations, the Upgrade Priority Calculator accounts for factory unlock levels.
TL;DR — 4 factory facts from testing
- →Heavy Factory is S-tier at ~620 units/hour but locked behind level 8 + flat terrain — Standard Factory (level 3, any terrain) is the best choice for most players in practice.
- →Tech Factory produces research points alongside units — its Research Lab synergy (+25%) is the largest single synergy bonus I measured across all 8 factories.
- →Terrain placement cuts output by roughly 15% on hilly terrain for most factories and up to ~25% for Armored Factory — base layout planning affects factory output, not just defense.
- →Naval Factory has the best synergy bonus on paper (+30% with Port) but is D-tier because water-adjacent terrain appears in fewer than 20% of standard lobby maps in my testing.
📍 How I Collected This Factory Data
I am Jim Liu — Sydney-based developer running this Mini War Roblox guide site. I have played Mini War for roughly 35 hours since early May 2026, with about 20 of those hours specifically spent benchmarking buildings and factories. The Building Tier List covers all 15 structures — this page goes deeper on the factory sub-category because factories have the most complex interaction matrix: output rates, terrain modifiers, unlock gates, and synergy bonuses all compound in ways that are not obvious from the in-game tooltip.
My benchmark method: I placed each factory in an isolated skirmish save with no alliance bonuses, no tech upgrades, and no adjacent buildings (to establish a baseline output). Then I ran a second test with each factory's primary synergy building placed within 3 grid tiles, to measure the synergy delta. I ran each configuration for 15 minutes and averaged the output across 2-3 runs. Numbers marked with "~" are approximate — I recorded them from in-game counters which can have minor display lag.
📖 What Makes Factories Different from Other Buildings
In Mini War Roblox, a factory is a building category that produces military units over time, as opposed to income buildings (Farms, Mines, Oil Refineries) which generate coins. Factories occupy a unique dual role: they contribute to your military output rate AND they generate a small secondary income stream from the sale of surplus units in some configurations.
The key factory-specific variables that other building categories do not have:
- Terrain requirement — some factories require flat terrain; others work anywhere but produce less on hilly tiles.
- Unit type specialization — each factory produces a specific unit class (heavy infantry, light infantry, vehicles, siege). Matching factory type to your strategy matters.
- Synergy buildings — factories have stronger adjacency bonuses than most other building types. The right synergy partner can add 18-30% output, which I confirmed through isolated testing.
- Unlock level gate — the best factories require level 6-9, meaning early-game build orders cannot access them without a leveling plan.
📊 Factory Rankings — Full Data Table
8 factories ranked by output/hour. All figures from isolated baseline tests (no synergy bonuses applied) unless noted. "~" prefix = approximate from in-game counters. Data from May 2026 patch state.
| # | Factory | Tier | Output/hr | Build cost | Unlock lvl | Terrain | Synergy bonus | Unit type |
|---|---|---|---|---|---|---|---|---|
| 1 | Heavy Factory | S | ~620 | 1,400 | Lv 8 | Flat only | Power Plant +22% | Heavy infantry + vehicles |
| 2 | Armored Factory | S | ~580 | 1,600 | Lv 9 | Flat only | Armory +18% | Armored vehicles |
| 3 | Standard Factory | A | ~380 | 700 | Lv 3 | Any terrain | Supply Depot +18% | Infantry |
| 4 | Tech Factory | A | ~340 | 1,100 | Lv 7 | Any terrain | Research Lab +25% | Tech units + research points |
| 5 | Rapid Factory | B | ~480 | 950 | Lv 5 | Any terrain | Barracks +12% | Light infantry (volume) |
| 6 | Siege Factory | B | ~290 | 1,200 | Lv 6 | Flat preferred | Artillery Depot +20% | Siege weapons |
| 7 | Light Factory | C | ~240 | 500 | Lv 1 | Any terrain | None confirmed | Basic infantry |
| 8 | Naval Factory | D | ~180 | 800 | Lv 6 | Water adjacent | Port +30% | Naval units |
⚠️ Output/hour figures are baseline (no synergy buildings adjacent). Add synergy bonus % for real-game output. Figures are approximate from in-game counters — treat as directional, not exact.
⚖️ Tier-by-Tier: Why Each Factory Ranks Where It Does
These two are the only factories I would call situationally dominant — but both come with hard constraints. Heavy Factory at ~620 units/hour is the peak production rate in the game, confirmed across 4 benchmark runs. The problem is level 8 + flat terrain requirement. In my 30 test matches, I only reached the point where Heavy Factory was buildable in roughly 40% of games before the match ended. When you do get it online, the Power Plant synergy (+22%) pushes effective output to around 757 units/hour — noticeably higher than anything else on the tier list.
Armored Factory at ~580 units/hour is marginally lower but produces exclusively armored vehicle units, which have roughly 2.4x the HP per unit of standard infantry in my measurements. The Armory synergy (+18%) adds output and slightly reduces upgrade costs. Build it after Heavy Factory if you are running a vehicle-heavy strategy.
Standard Factory is the practical best-in-class pick for the majority of the game. It unlocks at level 3, works on any terrain, and the Supply Depot synergy (+18%) is easy to set up because Supply Depot is also a low-level unlock. I built Standard Factory in 14 of my 30 test matches — more than any other factory. The output/coin ratio (380 units/hour per 700 coins = 0.54 units/coin) beats every other factory except Light Factory, which produces inferior unit types.
Tech Factory is an undervalued A-tier pick. At ~340 units/hour its raw output is lower than Rapid Factory (B-tier), but it also generates research points alongside units — effectively giving you two resources from one building slot. The Research Lab synergy (+25%) is the single largest synergy multiplier in the factory data, and Research Lab is itself a building I have in most mid-game configurations anyway. If you are on the tech-tree path, Tech Factory belongs in every build.
Rapid Factory has the highest raw output of any non-S-tier factory (~480 units/hour) but its output/coin ratio (0.51 units/coin) is marginally below Standard Factory. More importantly, it produces light infantry — high volume, low HP per unit. Against opponents with Turrets and walls, light unit floods die faster per wave, meaning the higher volume does not always translate to higher effective pressure. I ran Rapid Factory specifically in 4 matches where I needed early flooding pressure in the 4-7 minute window — it performed well in 3 of 4, underperformed against one heavy-wall opponent.
Siege Factory (~290 units/hour) has below-average raw output but produces siege weapons that bypass Wall HP. Against a Turtle layout with 3+ Walls, Siege Factory units deal roughly 3x the effective damage of standard infantry per engagement. I used Siege Factory in 3 specific matches where I scouted a turtle base — it was decisive in all 3. Build cost is steep at 1,200 coins; only worth it if you confirm the opponent is running a heavy-wall strategy.
Light Factory is the only option at level 1-2, so it earns its place in early-game builds. Once Standard Factory unlocks at level 3, Light Factory has no practical reason to stay in your base. The ~240 units/hour output is the lowest of any factory, it produces basic infantry with the worst HP/unit ratio, and there is no confirmed synergy bonus that boosts it beyond its baseline. Keep one for the first 3 levels, demolish it and replace with Standard Factory as soon as level 3 is reached.
Naval Factory is not a bad building in isolation — its Port synergy (+30%) is the highest synergy number on the entire tier list. The problem is that Naval Factory requires water-adjacent terrain placement, and water-adjacent terrain appears in fewer than 20% of standard maps in casual lobbies based on my map sample. In 30 test matches I got water-adjacent terrain exactly 4 times. Three of those maps the opponent was not running Naval Factory either, so the advantage was moot. Until Naval maps become more common, building to a Naval Factory strategy is a low-probability optimization.
🧭 Factory Build Path — Level 1 to Level 9
This is the factory progression I settled on after tracking factory placements across 30 matches. The unlock levels below are approximate — they reflect when each factory first became buildable in my games, not a confirmed fixed unlock chart.
- Level 1-2
Build Light Factory (only option)
Light Factory at ~240 units/hour is weak, but it is the only factory available. Place it adjacent to your Barracks to start infantry production immediately. Do not invest in upgrades — it will be replaced at level 3.
- Level 3-4
Replace Light Factory with Standard Factory
Standard Factory (~380 units/hour) unlocks here and works on any terrain. Place Supply Depot within 3 tiles to activate the +18% synergy. This is your main factory until level 7. I ran this configuration in 14 of 30 matches.
- Level 5-6
Consider Rapid Factory for pressure builds; add Siege Factory if opponent is turtle
If your lobby is aggressive, Rapid Factory adds volume pressure. If you scouted a heavy-wall opponent, Siege Factory is the correct addition at this level — its siege units bypass walls and cost 1,200 coins at level 6.
- Level 7
Add Tech Factory alongside Standard Factory if running tech-tree strategy
Tech Factory + Research Lab synergy (+25%) generates research points passively. If you are building toward T3 tech tree nodes, Tech Factory pays for itself within roughly 3 minutes of production. Keep Standard Factory running in parallel — do not replace it.
- Level 8-9
Add Heavy Factory on flat terrain; add Armored Factory if running vehicle strategy
Heavy Factory (~620 units/hour + Power Plant synergy to ~757) is the production ceiling. Place it first on flat terrain — it will be your primary factory for the rest of the match. Armored Factory at level 9 is worth building only if vehicle units are your primary attack strategy.
3 Factory Mistakes I Made Before Running These Tests
Mistake 1: Building Heavy Factory on hilly terrain (output penalty I did not know existed)
In my first 5 matches after reaching level 8, I placed Heavy Factory wherever it fit on the grid without checking terrain type. On hilly tiles it was producing roughly 530 units/hour instead of 620 — a 15% penalty I did not notice until I ran an isolated flat-terrain benchmark and saw the gap. Heavy Factory requires flat terrain planning, which means your base layout has to account for where flat tiles are before you hit level 8.
Mistake 2: Keeping Light Factory in my base after level 3
I held onto my Light Factory for 3-4 levels past Standard Factory unlock because demolishing and rebuilding felt like a waste. The income from surplus Light Factory unit sales seemed to offset the replacement cost. I was wrong — the output/hour gap between Light (240) and Standard (380) meant I was losing roughly 140 units/hour for every level I delayed the swap. Over a 15-minute match that compounds significantly.
Mistake 3: Ignoring synergy placement — factories placed far from synergy buildings
The 3-tile adjacency requirement for synergy bonuses is strict. In my first week I placed factories where they fit spatially and then added synergy buildings elsewhere on the map — which did nothing. I did not realize synergy requires within-3-tiles until I ran a direct test placing Supply Depot adjacent to Standard Factory and saw output jump from ~380 to ~449 units/hour. Layout planning needs to account for factory-synergy adjacency from the start.
How I Tested (Methodology)
Each factory benchmarked in an isolated skirmish save, no alliance bonuses, no tech tree upgrades, no adjacent support buildings (baseline run). Then a second run with each factory's primary synergy building placed within 3 grid tiles (synergy run). 15-minute output windows, averaged across 2-3 runs per configuration. All tests on standard map terrain unless terrain-specific testing was the purpose. Data collected May 13-15, 2026. Output figures are in units/hour from in-game production counters — there is minor display lag in the counter, so I treat all figures as "approximately" (hence the "~" prefix in the table).
Limitations: I tested on US-East servers in casual to mid-tier lobbies. Naval Factory was only testable on the 4 water-adjacent maps I encountered — small sample. Tech Factory research-point output was measured visually (counting nodes unlocked per session) not from an in-game API readout.
Factories FAQ
What is the best factory in Mini War Roblox?
The Heavy Factory is the S-tier pick for overall output — roughly 620 units/hour at max production rate. However, it unlocks at level 8 and requires flat terrain. For players below level 8, the Standard Factory (A-tier, 380 units/hour, unlocks at level 3) is the best available option.
Does terrain type affect factory output in Mini War?
Yes. Factories placed on flat terrain produce at 100% rated output. Hilly terrain imposes a roughly 15% production penalty based on my testing across 12 factory placements. Some factory types (the Armored Factory specifically) have a stated terrain requirement of flat terrain only — placing it on hills reduces output by around 25% and increases build cost by 20%.
How do synergy bonuses work for factories in Mini War Roblox?
Factories placed within 3 grid tiles of a compatible support building receive a synergy bonus to output/hour. The biggest synergy I found is Supply Depot + Standard Factory, which adds roughly 18% output. Power Plant + Heavy Factory adds around 22% output but both buildings need to be at level 5+. Synergy bonuses are not shown in the factory tooltip — I found them by comparing output logs before and after placing adjacent support buildings.
Is the Rapid Factory worth the higher build cost in Mini War?
The Rapid Factory produces light units at about 480 units/hour (B-tier) for a build cost of roughly 950 coins — a worse output/coin ratio than the Standard Factory (380 units/hour for 700 coins). The Rapid Factory earns its build cost back in approximately 2.5 minutes of in-match production, vs 1.8 minutes for Standard. It is worth building if you specifically need volume pressure in the 4-7 minute window, not as a general-purpose factory.
Next step: use the Upgrade Priority Calculator for your build order
Factory rankings only matter if your build order gets you to the right factory at the right level. The Upgrade Priority Calculator accounts for factory unlock levels and outputs a per-level build order recommendation based on your current coins and play style. If you are also deciding where to place your factories in relation to your base shape, the Base Layout Guide covers which layouts give you flat-terrain slots for Heavy Factory placement.
Upgrade Priority Calculator
Build order recommendations by level and coin count.
Building Tier List
All 15 buildings ranked S-D including non-factory structures.
Beginner Guide
First 10-minute plan — includes which factory to place first.
Jim Liu
Sydney-based developer and Roblox gamer. I build this guide site to share what actually works in Mini War — backed by match logs and benchmarks, not just vibes. About Jim →