- Tower Lab upgrade guide priorities start with permanent progression and research speed.
- Unlock additional labs gradually so more long-term bonuses can run at once.
- Game Speed is an early priority because it improves the pace of future progress.
- Boost several labs at moderate multipliers before spending heavily on one boost.
- Use lab history and auto research to reduce downtime between research levels.
Tower Lab Upgrade Guide: How Labs Work
The Tower Lab upgrade guide begins with one principle: laboratory research is a long-term progression system, not a short-term combat purchase. Labs improve scaling, increase upgrade caps, unlock quality-of-life functions, and strengthen systems such as cards, perks, bots, modules, and ultimate weapons.
The first lab becomes available after reaching the relevant milestone at Tier 1, Wave 30. Additional lab slots let you research several upgrades simultaneously, but they require gems. Because lab bonuses continue working across many runs, keeping every available slot active is usually more valuable than repeatedly changing research without a plan.
Lab Slot Costs
| Lab Slot | Unlock Cost | Strategic Value | Recommended Timing |
|---|---|---|---|
| Lab 1 | Free | Establishes permanent research | Unlock immediately |
| Lab 2 | 100 gems | Adds a second research queue | Early priority |
| Lab 3 | 400 gems | Improves research coverage | Early to mid progression |
| Lab 4 | 1,400 gems | Supports parallel specialization | Mid progression |
| Lab 5 | 3,000 gems | Maximum research capacity | Long-term goal |
| Total | 4,900 gems | Five active labs | Plan around gem income |
The best early setup normally combines one economy or utility research, one combat research, and one general progression research. This prevents your account from becoming strong in only one area while leaving other systems underdeveloped.
Keep a research queue active whenever possible. Even a modest upgrade contributes over time, while an empty lab creates permanent lost progress.
Core Lab Features
Several interface features make research management more flexible:
- Switching labs: You can move a current research project to another lab. Coins spent on the project are refunded, and saved progress is displayed as green lab time until the project resumes.
- Auto Research: The timer icon beside the progress bar can automatically begin the next level of the selected research.
- Lab History: The History tab records completed research in chronological order, helping you review milestones and track long projects.
- Speed Up: Lab research can be accelerated with Elite Cells for selected durations and multipliers.
These tools are especially useful when your priorities change between farming, tournament preparation, event progression, and general account development.
Best Research Priorities for New Accounts
Early research should improve the speed and reliability of every future run. The most useful opening choices are usually broad upgrades rather than highly specialized bonuses that only benefit one build.
Game Speed
- High account-wide value
- Improves the pace of future runs
- Reaches a maximum of Level 7
Economy Research
- Starting Cash
- Cash Bonus and Cash per Wave
- Coins per Kill and Coins per Wave
Workshop Discounts
- Attack Discount
- Defense Discount
- Utility Discount
Game Speed deserves early attention because it affects how quickly waves progress and how efficiently you can reach later milestones. Economy research is also valuable because stronger cash and coin income improves workshop purchases during runs and supports faster account development.
Early Research Categories
| Category | Examples | Main Benefit | Priority |
|---|---|---|---|
| General | Game Speed, Starting Cash, Buy Multiplier | Improves overall progression | High |
| Economy | Cash Bonus, Cash per Wave, Coins per Kill | Increases run income | High |
| Workshop | Attack, Defense, Utility Discounts | Reduces upgrade pressure | High |
| Combat | Damage, Attack Speed, Critical Factor | Improves damage output | Medium to high |
| Utility | Target Priority, Card Presets, More Round Stats | Improves control and convenience | Medium |
A practical opening order is to establish Game Speed, add economy support, then improve the combat stat that matches your current build. Attack Speed and Damage are broadly useful, while Critical Factor becomes more attractive once your account can benefit from critical-hit scaling.
Do not treat maximum research levels as immediate objectives. Some labs have very high caps, such as Damage and Health reaching Level 100, while other upgrades are intentionally short, such as Extra Orb Adjuster at Level 1. The correct goal is not to max everything in order; it is to unlock the next meaningful breakpoint.
Choose research that improves several future runs or unlocks a new system before investing in a narrow upgrade with limited immediate impact.
Midgame and Advanced Lab Planning
As your account develops, lab planning becomes more specialized. You will have access to research connected to attack, defense, utility, ultimate weapons, perks, bots, enemies, modules, and battle conditions. At this stage, the best queue depends on your active build and the milestones you are trying to reach.
Research Groups and Typical Uses
| Research Group | Representative Upgrades | Best Use |
|---|---|---|
| Attack | Damage, Attack Speed, Range, Critical Factor | Builds focused on direct damage |
| Defense | Health, Health Regen, Defense Absolute, Defense% | Health-based and survival builds |
| Utility | Cash Bonus, Coins per Kill, Target Priority | Farming and smoother run control |
| Ultimate Weapons | Missile upgrades, Chrono Field Duration, Death Ray | Accounts developing weapon-specific strategies |
| Perks | Unlock Perks, Waves Required, Perks Bonus | Perk-focused progression |
| Bots | Flame, Thunder, Golden, Amplify Bot Cooldown | Accounts investing in bot uptime |
| Modules | Reroll Shards, Module Shard Costs | Module progression and customization |
| Battle Conditions | Reduction and group reductions | Tournament and challenge preparation |
A strong midgame queue often uses one slot for general progression, one for your primary build, one for economy, and the remaining slots for system unlocks or event-specific preparation. This structure keeps permanent progress moving without ignoring the mechanics that define your current strategy.
When to Change Research
Switching a lab is useful when:
- A new milestone unlocks a high-impact research option.
- Your current build changes from health-focused to damage-focused.
- A tournament or event rewards a specific research direction.
- A short upgrade can unlock a feature before a longer project.
- You need to finish a breakpoint that improves your next farming run.
Saved research progress is preserved when moving a project, but the coins must be paid again when you resume it. For that reason, switching should be deliberate rather than frequent.
Do not constantly rotate long projects. Preserve a stable research plan, and switch only when the new project offers a clear progression breakpoint or important system unlock.
Useful Long-Term Targets
Some research has broad value, while other projects support specific systems:
- Perk research can improve how reliably you reach useful perk combinations.
- Bot cooldown research increases the availability of bot effects during extended runs.
- Module research helps support rerolls and module progression.
- Ultimate weapon research should follow the weapons you actively use.
- Enemy research can improve performance against common or fast enemies.
- Battle Condition research is more specialized and becomes increasingly relevant for challenging content.
Review your actual damage sources and failure points before selecting advanced research. If runs end because enemies overwhelm your tower, defensive or damage research may be more useful than another economy level. If you survive comfortably but progress slowly, economy and game-speed research may provide the better return.
Lab Boosts, Gem Rushing, and Efficiency
Lab acceleration has two main forms: rushing completed time with gems and boosting active research with Elite Cells. Both systems can save time, but neither should replace a consistent queue.
Gem Rush Reference
| Remaining Time | Gem Cost | Approximate Gems per Day | Discount |
|---|---|---|---|
| 1 hour | 7.5 | 180 | 0% |
| 1 day | 163 | 163 | 9% |
| 1 week | 1,000 | 142.9 | 21% |
| 30 days | 3,550 | 118.3 | 34% |
| 90 days | 8,000 | 88.9 | 51% |
| 360 days | 25,000 | 69.4 | 61% |
| More than 360 days | 25,000 | Not applicable | Not applicable |
Longer rushes generally provide a better gem-per-day rate, but the value depends on your gem supply and the importance of the research. Rushing a key unlock before a major progression attempt can make sense. Rushing ordinary levels simply to clear a queue is usually less compelling.
Fully completing a lab’s research levels can also improve gem-rush efficiency. Each fully completed lab adds 0.015x efficiency additively, according to the established lab system.
Elite Cell Boosts
Boosts can accelerate a lab at 1.5x, 2x, 3x, 4x, 5x, 6x, 7x, or 8x for one hour, eight hours, or 24 hours. Boosts only apply while a lab is actively assigned to research.
| Boost | 1 Hour | 8 Hours | 24 Hours |
|---|---|---|---|
| 1.5x | 15 cells | 120 cells | 360 cells |
| 2x | 100 cells | 800 cells | 2,400 cells |
| 3x | 840 cells | 6,720 cells | 20,160 cells |
| 4x | 3,360 cells | 26,880 cells | 80,640 cells |
| 5x | 11,900 cells | 95,200 cells | 285,600 cells |
| 6x | 60,000 cells | 480,000 cells | 1,440,000 cells |
| 7x | 250,000 cells | 2,000,000 cells | 6,000,000 cells |
| 8x | 1,000,000 cells | 8,000,000 cells | 24,000,000 cells |
The cost rises sharply at higher multipliers. In many situations, spreading moderate boosts across several labs gives more total skipped research time than applying one expensive boost to a single lab.
Start with moderate boosts across multiple active labs. Move to higher multipliers only when your Elite Cell income can comfortably sustain the cost.
Check Active Research
Confirm that each lab has a project assigned and identify which projects benefit most from acceleration.
Select Speed Up
Open the selected lab, choose Speed Up, and compare the available duration and multiplier options.
Compare Total Cost
Review the Elite Cell cost for one lab and compare it with spreading smaller boosts across several labs.
Queue Future Boosts
Configure automatic speed-up settings when appropriate so the next boost can queue after the current one finishes.
Daily Lab Management Checklist
Good lab management is mostly a matter of avoiding downtime and matching research to your current objective. A short daily review can protect your long-term progression without requiring constant micromanagement.
Daily Lab Goals:
- Confirm every unlocked lab has active research
- Enable Auto Research on repeatable priority projects
- Review completed research and select the next useful breakpoint
- Check whether gem rushing supports an important milestone
- Use Elite Cell boosts across multiple labs when efficient
Recommended Review Routine
| Review Point | What to Check | Why It Matters |
|---|---|---|
| Start of session | Empty labs and finished projects | Prevents research downtime |
| Before a long break | Auto Research settings | Maintains queue continuity |
| Before farming | Economy and Game Speed projects | Supports faster resource growth |
| Before tournaments | Damage, defense, and battle-condition options | Aligns research with competitive goals |
| After a milestone | Newly unlocked labs and systems | Updates your research priority list |
The History tab is helpful when comparing your current plan with past decisions. Use it to identify neglected categories, confirm when a major upgrade was completed, and avoid repeating research choices that no longer support your build.
For general game information and official updates, review the official Tower Lab Steam page. Game systems can change with patches, so verify costs and maximum levels in your client before committing scarce resources.
Set a simple rotation before opening the lab menu: general progression, build power, economy, and system unlocks. A repeatable plan is easier to maintain than reacting to every new option.
Tower Lab FAQ
Q: What should I research first in Tower Lab?
Start with broad upgrades such as Game Speed, economy research, and useful workshop discounts. Then add Damage or Attack Speed based on your current build and progression bottlenecks.
Q: How many labs can be unlocked?
The standard lab system allows up to five active labs. The first lab is free after its milestone unlock, while the additional slots require a total of 4,900 gems.
Q: Is gem rushing better than using Elite Cell boosts?
They serve different purposes. Gem rushing skips remaining time on a selected project, while Elite Cell boosts accelerate active research for a chosen duration. Compare the cost with the importance of the upgrade and your available resources.
Q: Should I use the highest lab speed multiplier?
Not usually. Higher multipliers become disproportionately expensive, so several moderate boosts across multiple labs can provide better overall efficiency when your Elite Cell income is limited.
Keep every lab working, prioritize broad account benefits, and spend acceleration resources where they create a clear milestone advantage.