Ars Goetia's dark fantasy dungeon crawler released on 26 May 2022 through Dear Villagers, and it asks you to pick which of six demons your character serves before the first fight. That pact is the class system: Lucifer, Beelzebub, Baal, Satan, Asmodeus and Leviathan each hand you a different skill tree, different stat growth per level and a different Demon Form. Combat is turn based on a fatigue clock rather than a strict you go, I go order, so cheap actions can chain before an enemy ever moves.
Combat in Hellslave rewards knowledge over reflexes. Understanding how each mechanic works (and how they interact) is what turns a struggling player into a dominant one. New here? Start with our beginner's guide for the basics.
Core Combat Mechanics
1. Demonic pact instead of a class
You pledge to one of six demons at the start, and that choice sets your stat growth, your Demon Form and your entire skill tree. Lucifer gains 9 life and 4 mana per level, Leviathan only 5 life but 7 mana, and Beelzebub trades mana income for Rage.
Why it matters: This is the foundation of all combat. Everything else builds on this.
2. Fatigue clock turn order
Every action costs time on a fatigue bar instead of simply ending your turn, so cheap skills can fire several times before an enemy acts. Abilities like Interruption and Time Warp add seconds of fatigue to enemies, which is how you steal whole rounds.
Why it matters: The most underrated mechanic. Players who master this early have a massive advantage.
3. Momentums and Postures
Momentums are the active abilities on your battle menu and cost Mana or Rage. Postures unlock at character level 6 and work as passive stances, and each demon offers a different count of both, with Satan and Asmodeus reaching 11 Momentums apiece.
Why it matters: Unlocks a new layer of gameplay depth once understood.
4. Demon Form charged over five fights
Your Demon Form charges across five fights, and several of the strongest abilities only recharge when it triggers. Apocalyptic Choreography, Satanic Power, Focus and Wound Aggravation all reset on Demon Form, so entering a boss with it ready doubles your burst.
Why it matters: The tactical edge that separates average players from advanced ones.
5. Recipe scrolls and crafting
Crafting recipes appear as floating scrolls inside dungeons and cannot be bought from a merchant. Materials such as Infernium Ore, Abyss Coral, Demon Tooth and Stones of Arbenia feed the first seven recipe tiers, so selling them is a mistake you find out about later.
Why it matters: The endgame optimization mechanic. Small improvements here compound into massive gains.
How These Mechanics Combine
Understanding how mechanics interact is where real optimization happens:
Demonic pact instead of a class + Fatigue clock turn order
You pledge to one of six demons at the start, and that choice sets your stat growth, your Demon Form and your entire skill tree. When combined with Fatigue clock turn order, every action costs time on a fatigue bar instead of simply ending your turn, so cheap skills can fire several times before an enemy acts. This combination is the core of every effective build.
Momentums and Postures + Demon Form charged over five fights
Momentums are the active abilities on your battle menu and cost Mana or Rage. Paired with Demon Form charged over five fights, your demon form charges across five fights, and several of the strongest abilities only recharge when it triggers. This is why the tier list favors builds that leverage both.
Recipe scrolls and crafting as a Multiplier
Crafting recipes appear as floating scrolls inside dungeons and cannot be bought from a merchant. Materials such as Infernium Ore, Abyss Coral, Demon Tooth and Stones of Arbenia feed the first seven recipe tiers, so selling them is a mistake you find out about later. This system amplifies everything else. The better your Recipe scrolls and crafting optimization, the more your other mechanics pay off.
Combat by Build
Each build approaches combat differently:
Lucifer (A-Tier)
Combat approach: Balanced combat style. Key equipment: Balam's Strike Primary mechanic: Demonic pact instead of a class
Lucifer offers a solid combat experience. Full setup in our builds guide.
Beelzebub (A-Tier)
Combat approach: Balanced combat style. Key equipment: Apocalyptic Choreography Primary mechanic: Fatigue clock turn order
Beelzebub offers a solid combat experience. Full setup in our builds guide.
Baal (A-Tier)
Combat approach: Balanced combat style. Key equipment: Wound Aggravation Primary mechanic: Momentums and Postures
Baal offers a solid combat experience. Full setup in our builds guide.
Leviathan (A-Tier)
Combat approach: Balanced combat style. Key equipment: Time Warp Primary mechanic: Demon Form charged over five fights
Leviathan offers a solid combat experience. Full setup in our builds guide.
Asmodeus (A-Tier)
Combat approach: Balanced combat style. Key equipment: Destruction Primary mechanic: Recipe scrolls and crafting
Asmodeus offers a solid combat experience. Full setup in our builds guide.
Advanced Combat Techniques
Damage Optimization
- Match your equipment to your build's stat priorities
- Exploit Demonic pact instead of a class for maximum damage windows
- Chain Fatigue clock turn order and Momentums and Postures for combo damage
- Use Demon Form charged over five fights to create openings
Survivability
- Learn enemy patterns before committing to attacks
- Read the demon description before you pick. There is no way to change pact mid run, and each of the six lays its skill tree out differently even where the abilities overlap.
- Position using Demonic pact instead of a class to control spacing
- Save defensive options for guaranteed survival, not comfort
Boss Combat
Bosses test your understanding of every mechanic. See our boss guide for fight-specific strategies.
- Phase awareness: Most bosses change behavior at health thresholds
- Patience over aggression: One extra hit per opening beats dying to greed
- Build preparation: Swap gear and equipment for specific fights when needed
Common Combat Mistakes
- Button mashing: Committed attacks have recovery frames. Mashing locks you into animations.
- Ignoring Fatigue clock turn order: This mechanic exists for a reason. Players who use it take significantly less damage.
- Wrong equipment for the situation: Check our weapons guide for situational picks.
- Not learning from deaths: Every death teaches something. If you don't know why you died, you'll die the same way again.
- Overcommitting: Trading hits works in Byleth but will get you killed in Lair of Zarrak.
More Hellslave Guides
- Hellslave Hellslave Overview
- Hellslave Best Builds
- Hellslave Tier List
- Hellslave Walkthrough
- Hellslave Beginner's Guide
- Hellslave Tips & Tricks
- Hellslave Weapons Guide
- Hellslave Boss Guide
- Hellslave Maps & Locations
- Hellslave Crafting Guide
- Hellslave Classes & Characters
Similar Games
If you enjoy Hellslave, check out these related guides:
- Elden Ring Combat Guide: rpg game with similar mechanics
- Baldur's Gate 3 Combat Guide: rpg game with similar mechanics
- Cyberpunk 2077 Combat Guide: rpg game with similar mechanics
