Level 4-9
System Reboot Challenge
The ultimate Chapter 4 endurance test - a time attack challenge that combines every mechanic from all previous levels. Unlike story levels, this is a pure skill showcase with online leaderboards. Can you achieve S-Rank and claim your spot among the elite?
Level Objectives
- Complete all 9 challenge segments
- Achieve S-Rank (under 6 minutes)
- Maintain 80%+ accuracy
- No deaths allowed
Video Walkthrough
Step-by-Step Guide
Challenge Structure
9 segments back-to-back with NO breaks or checkpoints. Death = restart from segment 1. Each segment is 30-45 seconds long, total optimal time ~6 minutes. Segments 1-9 mirror levels 4-1 through 4-8 plus a finale rush. Time bonuses: Kill enemies quickly (+0.5s per enemy), no damage taken (+5s per segment).
Segment 1: Speed Streets (0:00-0:40)
Neon Streets in 40 seconds. 20 enemies spawn in fixed positions. Optimal path is memorized (left corridor → center platform → right spiral). Digital interference still occurs every 15 seconds - time your movements around it. Pro tip: You can skip the second interference if you're fast enough.
Segment 2: Stream Sprint (0:40-1:20)
Data Core streams at 2x speed. 40-second segment. All streams are damage-dealing (no green). The pattern is fixed and learnable. Key: Follow the 'S-pattern' - top-right → middle-left → bottom-right → exit. Hug stream edges and move in short dashes, never long sprints.
Segment 3: Security Blitz (1:20-2:10)
Digital Fortress security in 50 seconds (30 seconds less than normal). Password Gate (10s), Laser Grid (12s), Drone Swarm (15s), Firewall (13s). Each layer punishes hesitation. Memorize exact password (changes daily - check community discord), pre-plan laser movements, focus-fire drones, circle-strafe firewall.
Segment 4: Perspective Gauntlet (2:10-3:00)
Server Room with shifts every 8 seconds (faster than normal). 50-second segment with 6 perspective changes. 30 enemies spawn during shifts. The disorientation is extreme. Strategy: Stop moving 1 second before each shift, reorient during the shift animation, then continue. Don't fight the perspective - work with it.
Segment 5: Defense Rush (3:00-4:00)
Mainframe defense for 60 seconds. Upload a 60% virus (instead of 100%). Node has 8,000 HP. Enemy spawn rate is 3x normal - absolute chaos. Position yourself at 45-degree angle to node (protects it while giving you firing lanes). Prioritize Kamikazes > Elites > Basics. Use bombs liberally here.
Segment 6: Mini Nexus (4:00-4:40)
Condensed Network Nexus - only 3 sectors (40 seconds total). Sector A: Neon Streets (12s), Sector B: Data Streams (15s), Sector C: Security (13s). Each sector has a mini-boss (3,000 HP). This segment separates good players from great ones. Flawless execution required.
Segment 7: Boss Rush Intro (4:40-5:10)
Fight condensed versions of Cyber Guardian (30 seconds, one phase only, 25,000 HP). Only Phase 1 attacks (Gatling, Missiles, Slam). Weak point always exposed. Pure DPS check - you need ~835 DPS to clear in time. Use character abilities off cooldown.
Segment 8: Overlord Echo (5:10-5:50)
AI Overlord Phase 3 only (40 seconds, 30,000 HP required damage). The adaptive AI is disabled (too unfair for timed challenge), but the arena still fills with data streams. Overlord is always vulnerable. This is about managing positioning while maximizing damage. Stay mobile, shoot constantly.
Segment 9: Final Rush (5:50-6:00+)
The finale - 100 basic enemies spawn simultaneously in a circular arena. You have infinite bombs for 10 seconds. HOLD DOWN THE BOMB BUTTON and spin in circles. After 10 seconds, bombs end and remaining enemies must be shot normally. S-Rank requires clearing all 100 in under 25 seconds total.
Enemy Guide
Challenge Enemies
(All Types)Tips: Every enemy from Chapter 4 appears. They have reduced HP (50% of normal) but deal increased damage (150%). The balance favors aggressive play - kill fast before they kill you.
Boss Battle Tips
- •MEMORIZATION is king. Top players have the entire 6-minute run memorized move-for-move. Watch S-Rank replays (in-game leaderboard feature)
- •Segment-specific practice: You can practice individual segments in Training Mode (unlocked after first attempt). Master segments 3-6 individually before full runs
- •Accuracy matters: 80%+ accuracy requirement means you can't spray bullets. Every shot counts. Aim carefully even under time pressure
- •Death penalty: No checkpoint system is brutal. Most players fail at Segments 5-6. Don't attempt this challenge until you can consistently reach Segment 7
- •Rank requirements: S-Rank (under 6:00), A-Rank (6:00-7:00), B-Rank (7:00-8:00), C-Rank (8:00-10:00), D-Rank (10:00+). Only S/A appear on global leaderboard
- •Daily rotation: Password in Segment 3 changes daily. Security patterns change daily. Laser grids change daily. This keeps the challenge fresh and prevents pure memorization
- •Bomb economy: You have 5 bombs total for Segments 1-8 (Segment 9 has infinite). Optimal bomb usage: 2 in Segment 5, 2 in Segment 6, 1 in Segment 8. Save bombs for when you're overwhelmed
- •Character choice matters: Best characters for this challenge: Speed-type (faster movement for stream sections), Tank-type (survive Segment 5 chaos), DPS-type (boss segments). Community consensus: DPS-type is optimal
- •Time bonus stacking: If you clear Segments 1-8 with no damage, you gain 40 seconds (8 segments × 5 seconds). This means theoretically you could have up to 40 extra seconds for Segment 9 - making S-Rank more forgiving
- •Leaderboard competition: Top 100 players worldwide get exclusive rewards monthly. Top 10 get their names in the in-game Hall of Fame. Rank 1 gets a unique character skin
- •Community resources: Join the Acecraft Discord #chapter4-challenge channel. Daily strategy threads, video guides, and practice groups. Top players often coach newcomers