Upcoming
Speed Construction Challenge
A time-limited building event where construction and research times are reduced by 80%. Perfect opportunity to rapidly upgrade your HQ, complete tech trees, and strengthen your shelter infrastructure.
📅Start Date
Mar 20, 2026
⏰End Date
Jan 1, 2027
📋Requirements
- ▶HQ Level 10+
- ▶Unlocked Builder System
🎁Event Rewards
⭐Massive Speed-up Bundles
⭐Builder's Exclusive Tools
⭐Construction Milestone Chests
⭐Permanent Building Efficiency Boosts
⭐Architect's Legendary Title
Event Details
Speed Construction Challenge is a 5-day event providing an 80% reduction in all construction and research times. Players race to complete as many upgrades as possible to earn milestone rewards and climb the leaderboards.
Event Bonuses
Time Reduction (80% Off)
- All building construction -80% time
- All research projects -80% time
- Troop training -50% time (bonus)
- Hero leveling -30% EXP requirement (bonus)
- Vehicle modifications -60% time (bonus)
Example Time Savings
| Upgrade | Normal Time | Event Time | Savings |
|---|---|---|---|
| HQ 25 → 26 | 30 days | 6 days | 24 days |
| Laboratory 24 → 25 | 20 days | 4 days | 16 days |
| Alliance Recognition Tech | 15 days | 3 days | 12 days |
| City Walls 23 → 24 | 12 days | 2.4 days | 9.6 days |
| Assaulter Camp 25 | 8 days | 1.6 days | 6.4 days |
Challenge Objectives
| Challenge Level | Requirement | Points Earned |
|---|---|---|
| Bronze Builder | Complete 10 building upgrades | 1,000 |
| Silver Builder | Complete 25 building upgrades | 3,000 |
| Gold Builder | Complete 50 building upgrades | 7,000 |
| Platinum Builder | Complete 100 building upgrades | 15,000 |
| Diamond Builder | Complete 200 building upgrades | 35,000 |
| Master Architect | Complete 500 building upgrades | 100,000 |
Research Points
| Research Milestone | Points Earned |
|---|---|
| Complete 5 Research Projects | 2,000 |
| Complete 15 Research Projects | 6,000 |
| Complete 30 Research Projects | 15,000 |
| Complete 60 Research Projects | 35,000 |
| Complete 100 Research Projects | 75,000 |
Power Milestone Rewards
Gain bonus rewards based on total power increase during event:
| Power Gained | Rewards |
|---|---|
| +500K Power | Speed-up Bundle x5 Diamonds x1,000 Builder's Badge x1 |
| +1M Power | Speed-up Bundle x10 Diamonds x2,500 Golden Wrench x10 Builder's Badge x3 |
| +3M Power | Legendary Speed-up Bundle x5 Diamonds x7,500 Golden Wrench x30 Exclusive Border |
| +5M Power | Legendary Speed-up Bundle x10 Diamonds x15,000 Golden Wrench x50 Permanent Construction Speed +5% |
| +10M Power | Mythic Speed-up Bundle x5 Diamonds x50,000 Golden Wrench x100 Permanent Construction Speed +10% Title: "Master Architect" (Permanent) |
Leaderboard Rankings
| Rank | Criteria | Rewards |
|---|---|---|
| 1st Place | Most Total Upgrades | Mythic Speed-up Bundle x20 Diamonds x100,000 Permanent 3rd Builder Slot Discount -50% Permanent Construction Speed +15% Exclusive Title: "Legendary Architect" Unique Banner: Golden Hammer |
| 2nd-3rd Place | Upgrade Count | Mythic Speed-up Bundle x15 Diamonds x75,000 Permanent Construction Speed +12% |
| 4th-10th Place | Upgrade Count | Legendary Speed-up Bundle x20 Diamonds x50,000 Permanent Construction Speed +10% |
| 11th-50th Place | Power Gained | Legendary Speed-up Bundle x10 Diamonds x25,000 Permanent Construction Speed +7% |
| 51st-100th Place | Points Total | Epic Speed-up Bundle x20 Diamonds x10,000 Permanent Construction Speed +5% |
Alliance Competition
Alliances compete for collective construction achievements:
| Alliance Rank | Reward (Per Member) |
|---|---|
| 1st Place | Legendary Speed-up Bundle x10 Diamonds x25,000 Alliance Tech Acceleration x200% Alliance Banner: Master Builder (30 days) |
| 2nd-5th Place | Legendary Speed-up Bundle x7 Diamonds x15,000 Alliance Tech Acceleration x150% |
| 6th-20th Place | Epic Speed-up Bundle x10 Diamonds x7,500 Alliance Tech Acceleration x100% |
Daily Mission Bonuses
Complete daily construction tasks for extra rewards:
Day 1: Foundation Focus
- Upgrade any building 10 times - Diamonds x1,000
- Increase Structure Power by 100K - Golden Wrench x5
- Complete 1 HQ prerequisite - Speed-up Bundle x3
Day 2: Research Rush
- Complete 3 research projects - Diamonds x2,000
- Increase Tech Power by 50K - Research Speed-up x20
- Unlock 1 new tech - Badge x50
Day 3: Military Expansion
- Upgrade all troop camps 1 level - Diamonds x3,000
- Increase Military Power by 75K - Universal Hero Fragments x20
- Train 50K T3+ troops - Training Speed-up x30
Day 4: Economic Boom
- Upgrade all resource buildings - Diamonds x2,500
- Increase hourly production by 50K - Resource Pack x10
- Gather 5M resources - Gathering Speed boost x5
Day 5: Final Push
- Complete 20 upgrades in 24h - Diamonds x5,000
- Gain 500K power in final day - Legendary Chest x2
- Finish all daily missions 1-4 - Exclusive Builder Avatar
VIP Benefits During Event
| VIP Level | Additional Benefits |
|---|---|
| VIP 5-9 | Extra builder queue slot during event -5% additional time reduction |
| VIP 10-14 | 2 extra builder queue slots -10% additional time reduction Free instant completion (up to 1h) 5x/day |
| VIP 15+ | 3 extra builder queue slots -15% additional time reduction Free instant completion (up to 4h) 10x/day Resource cost -20% |
Optimal Upgrade Strategy
Priority 1: HQ Requirements
- Upgrade all HQ prerequisite buildings first
- Focus on Laboratory (required for HQ 8+)
- Complete City Walls, Alliance Center cycle
- Target next HQ level as primary goal
Priority 2: Research Trees
- Max out Shelter Building (no badges required)
- Complete HQ Management and Rapid Growth
- Focus on badge-free research first
- Save badge research for Alliance Duel
Priority 3: Military Buildings
- Level up all troop camps equally
- Upgrade Training Ground for faster troops
- Military Center for march capacity
- Hospital for troop protection
Priority 4: Economic Buildings
- Upgrade only if needed for HQ
- Focus on Warehouse for protection
- Resource buildings are low priority
- Gathering is more efficient than production
Resource Management Tips
- Stockpile before event - Gather 100M+ of each resource
- Use shields - Protect resources during heavy construction
- Alliance donations - Request resources daily
- Speed-up wisely - Save speed-ups for upgrades above 2 days
- Gems for instant - Use gems on cheap instant completions (under 200 gems)
Event Schedule
- Day 1 (00:00) - Event starts, 80% reduction active
- Day 1-2 - Focus on quick building upgrades for points
- Day 3 - Mid-event checkpoint, bonus rewards distributed
- Day 4 - Push for HQ upgrade completion
- Day 5 (00:00-18:00) - Final rush for milestone completion
- Day 5 (18:00-23:59) - Leaderboard freeze period
- Day 5 (23:59) - Event ends, all timers return to normal
Important Notes
- Time reduction applies only to NEW upgrades started during event
- Upgrades started before event do NOT receive bonus
- Upgrades in progress when event ends continue at reduced time
- Alliance help and VIP bonuses stack with event reduction
- Speed-ups used during event are more efficient (accelerate faster)
Pro Tips
- Plan your upgrade path - Know exactly what to upgrade before event
- Prepare resources - Don't waste event time gathering
- Use all builders - Keep all slots constantly busy
- Save long upgrades - Start 30-day HQ upgrades during event for massive savings
- Research overnight - Queue long research before sleeping
- Alliance coordination - Help each other finish upgrades faster
This is the perfect time to make months of progress in just days. Build smart, build fast!
Published: Mar 20, 2026