Collaboration Stages · Stage 1
Devils on the Doorstep (Insane)
デビルリバース・モーデン 超激ムズ
Devils on the Doorstep (Insane) is a Battle Cats stage in Super Metal Slug Defense. It costs 100 energy and sends 17 enemy spawn lines — led by DONALD MORDEN (Enemy) as the boss — against a 400,000 HP enemy base, and clearing it rewards 14,100 XP. Its enemies carry the Floating trait, so cats that target it do the most work here.
Data updated: 2026-08-31
100Energy Cost
14,100XP Reward
400,000Enemy Base HP
5,500Stage Length
8Max Enemies
8.1Difficulty
Enemy spawns (17)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 DONALD MORDEN (Enemy) | 100% | 1 | 0s | — | 100% | Boss |
 MARS PEOPLE (Enemy) | 1000% | 10 | 10s | 4s~10s | 100% | — |
| MARS PEOPLE (Enemy) | 1000% | 10 | 13.3s | 6s~18s | 100% | — |
 MARCO (Enemy) | 1000% | 3 | 20s | 10s~16.7s | 100% | — |
 ALLEN O'NEIL (Enemy) | 1500% | 1 | 40s | — | 100% | — |
 SV-001 (Enemy) | 1000% | 1 | 60s | — | 100% | — |
| SV-001 (Enemy) | 1000% | 1 | 66.7s | — | 100% | — |
| MARCO (Enemy) | 1000% | ∞ | 0.1s | 26.7s~53.3s | 99% | — |
| MARS PEOPLE (Enemy) | 1000% | ∞ | 0.1s | 16.7s~33.3s | 99% | — |
 HUGE HERMIT (Enemy) | 600% | 3 | 0.1s | 40s | 99% | — |
| SV-001 (Enemy) | 1000% | ∞ | 0.1s | 66.7s~100s | 99% | — |
| ALLEN O'NEIL (Enemy) | 1500% | 1 | 0.1s | — | 99% | — |
| MARCO (Enemy) | 1000% | 3 | 0.1s | 0.1s | 99% | — |
| MARS PEOPLE (Enemy) | 1000% | 3 | 0.1s | 0.1s | 99% | — |
| MARCO (Enemy) | 1000% | 3 | 0.1s | 0.1s | 99% | — |
 HI-DO (Enemy) | 100% | 1 | 0.1s | — | 99% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |