Fuse System Complete Guide
Fuses are team modifiers that fundamentally change how your duo plays. Choose your Fuse before the match to customize your team's combat style - from solo enhanced play to synchronized dual-character action.
What Are Fuses?
Fuses are selected during character select and cannot be changed mid-match. Each Fuse dramatically alters your team's mechanics, creating five distinct ways to play 2XKO. There's no "best" Fuse - the right choice depends on your playstyle and team composition.
All Fuses Explained
2X Assist
Tier ADoubles your assist options, allowing you to call both characters as assists. The most versatile Fuse for combo extension and pressure.
Effects
- Both team members can be called as assists
- Point character can still be tagged
- Maximum assist flexibility
- Standard assist cooldowns apply
Best For
- Combo-heavy teams
- Pressure-focused gameplay
- Flexible team compositions
Recommended Teams
- Yasuo + Ekko
- Jinx + Ahri
- Any duo with strong assists
Double Down
Tier SBoth characters share health and are always on screen. Massive damage potential but extremely risky - if one falls, both do.
Effects
- Both characters fight simultaneously
- Shared health pool
- No tagging (both always active)
- Devastating combo potential
- If health depletes, both KO
Best For
- High-risk, high-reward players
- Pressure specialists
- Coordinate duo play
Recommended Teams
- Vi + Blitzcrank (Piltover duo)
- Darius + Illaoi (bruiser pair)
Freestyle
Tier BRemoves the standard tag system restrictions. Tag freely at any time, creating unpredictable mix-up situations.
Effects
- Instant tag at any time
- No tag cooldown
- Creates unique mix-up opportunities
- Sacrifice some assist functionality
Best For
- Mix-up specialists
- Creative players
- Unpredictable playstyles
Recommended Teams
- Ahri + Ekko (mobile duo)
- Any fast characters
Juggernaut
Tier ASolo character mode with enhanced stats. Your point character gains significant buffs while partner stays in reserve permanently.
Effects
- Single character only (no partner)
- Increased health
- Enhanced damage
- Armor on certain moves
- No assists or tags
Best For
- Solo players
- Beginners learning fundamentals
- Players who main one character
Recommended Teams
- Darius (natural bruiser)
- Braum (tank)
- Any high-health character
Sidekick
Tier BYour partner acts as a permanent assist, automatically supporting your combos and pressure without manual calls.
Effects
- Partner auto-assists during combos
- AI-controlled support
- Simplified team management
- Consistent assist timing
Best For
- Players new to tag fighters
- Those who prefer single-character focus
- Learning assist timing
Recommended Teams
- Any character + projectile assist
- Point character with weak neutral
Fuse Comparison
| Aspect | 2X Assist | Double Down | Freestyle | Juggernaut | Sidekick |
|---|---|---|---|---|---|
| Team Complexity | High | Very High | High | None | Low |
| Damage Potential | High | Very High | Medium | High | Medium |
| Survivability | Medium | Low | Medium | High | Medium |
| Beginner Friendly | No | No | No | Yes | Yes |
How to Choose Your Fuse
New to 2XKO?
Focus on learning one character without team management complexity.
Learn how assists work with AI-controlled support.
Experience full team mechanics with manual assist timing.
Experienced Players
The standard competitive choice. Maximum flexibility and combo potential.
For coordinated duo play or those who can handle two characters at once.
Create unique mix-ups and pressure patterns with instant tags.
Pro Tips
- ✓Experiment in training mode
Try each Fuse with your team before ranked. Each one changes your combo routes.
- ✓Match Fuse to character strengths
High-health characters shine with Juggernaut. Mobile characters excel with Freestyle.
- ✓Counter-pick with Fuses
Against zoners, consider Freestyle for unpredictable approaches. Against rushdown, Juggernaut's armor helps.