Ashes of the Singularity II Substrate Build Order
A Substrate opening for Ashes of the Singularity II: cheap Hatchlings, the Eradicator timing, Reaper trades and the first Punisher.
Substrate is the faction of cheap units and regenerating shields. Its opening is the fastest of the three because Hatchling costs 50 Durantium, and its mid-game is the most mobile because shields let units disengage and re-engage.
This build order takes you from the Assembly to the Auxiliary Assembly, then to the first Punisher.
This guide reflects the November 10, 2026 launch build. Re-check key numbers after each patch.
The sequence
| Step | Build | Why |
|---|---|---|
| 1 | Durantium extractor | Income |
| 2 | Elerite extractor | Advanced units need it |
| 3 | Assembly | Hatchling, Clutch, Explorer |
| 4 | Second extractor pair | Sustain swarm production |
| 5 | Supply Depot | Logistics |
| 6 | Advanced Assembly | Eradicator, Destructor, Mauler |
| 7 | Auxiliary Assembly | Reaper, Sky Cleanser, Drone Hive |
| 8 | Aviary | Rampager, Dominator, Punisher |
| 9 | Sky Dominion research (ring 3) | Unlocks Punisher |
Substrate's production buildings are cheap relative to PHC's, which is why the faction can afford to spread across more regions. Use that: build production in a new region instead of stacking everything in your starting base.
The Hatchling opening
Hatchling is 720 HP and 12 DPS for 50 Durantium and one logistics point. It is the cheapest unit in the game, and it is meant to be spent. Build ten to fifteen in the first minutes, spread them across capture points and use them to scout.
Clutch of Eggs is the upgrade: 975 HP and 27 DPS, but it requires Swarm Incubation on research ring 1. It is worth the research if you plan to keep using infantry; skip it if you are rushing Eradicator.
Explorer is the scout at 1,000 HP and 18 DPS. One is enough. Capacitor is a support unit with no weapon; build it only when you understand what its shield utility is doing for your army.
The Eradicator timing
Eradicator is the reason to build an Advanced Assembly: 1,400 HP, 68 DPS, 1,400 range, 100 Durantium and 275 Elerite. It outranges UEF's Leopard IV and PHC's Nemesis, and it costs less Elerite than either.
Build four to six Eradicators as soon as the Advanced Assembly finishes. They are your line for the rest of the game. Do not replace them with Maulers; Mauler is a 9,500 HP tank with 23 DPS, useful as a shield but not as a damage unit.
Destructor is the artillery option at 1,700 range and 54 DPS. It is fragile at 1,000 HP, so keep it behind the Eradicator line.
The Reaper trade
Reaper is the unit that defines Substrate mid-game: 4,800 HP, 70 DPS, 1,000 range, 450 Durantium and no Elerite. The zero-Elerite cost is the point. You can keep producing Reapers while saving Elerite for research and aircraft.
The Reaper's short range is its weakness. It has to close distance, which means it takes damage before it fires. Use it as the anvil: Reapers absorb the first volley, Eradicators deal damage from 1,400 range, and the shields regenerate when the Reapers pull back.
The first Punisher
Punisher is the best-value aircraft in the game: 120 DPS, 1,800 range, 250 Durantium and 500 Elerite, unlocked by Sky Dominion on research ring 3. It has only 900 HP, so it must stay behind the ground line.
Build two or three Punishers, not ten. Their job is to punish artillery and tanks that cannot shoot up. If the opponent builds anti-air, stop producing Punishers and switch to ground.
Dominator is the interceptor at 82 DPS and 1,300 range; build it only if the opponent has aircraft. Rampager is the generalist gunship at 48 DPS and 1,275 HP.
Research priorities
- Swarm Incubation (ring 1) if you are staying on infantry.
- Shield Amplification (ring 1) for the shield economy.
- Advanced Assembly unlocks.
- Sky Dominion (ring 3) for Punisher.
- Apex Replicator and the super unit nodes only if the game goes long.
Substrate's research rings are compact. You do not need to research everything; you need to reach the units that match your composition.
Adaptation
Against UEF infantry: Destructor and Sky Cleanser. Explosion and Ion damage clear squads.
Against UEF Titans: Reaper to absorb, Eradicator to damage, Punisher to hit from above. Do not fight a Titan with Hatchlings.
Against PHC Champions: burst. Two Punishers and four Eradicators can kill a Champion before it closes; Hatchlings cannot.
Against air: Sky Cleanser first, Dominator second. Sky Cleanser is cheap at 300 Durantium and has 1,200 range.
What not to do
Do not build Eye of Darkness before you have map control. It costs 10 logistics and 330 seconds, and it is the slowest unit in the game.
Do not fight to the death. Substrate's advantage is disengaging; a Substrate army that stays in a losing fight is just a more expensive UEF army.
Do not ignore Elerite. Reapers are Elerite-free, but Eradicators, Punishers and research are not.
Transition to the mid-game
A finished opening looks like this:
- Three regions, one with an Advanced Assembly.
- Six Eradicators, four Reapers, one Sky Cleanser.
- Two Punishers in production.
- Shields regenerating between fights.
From here, the choice is air or armor. An Aviary-heavy army is mobile and punishes artillery; an Advanced Assembly army is more durable in a straight fight. The maps guide covers which maps favor which.
For the next step, read Ashes of the Singularity II Substrate Units and Stats→.
FAQ
When should I build the Advanced Assembly? After the second extractor pair and a Supply Depot. Eradicators are the mid-game core, so the sooner the better.
Is Reaper better than Eradicator? They do different jobs. Reaper absorbs damage; Eradicator deals it. Build both.
How many Punishers do I need? Two or three is enough to punish artillery. More only if the opponent has no anti-air.
Sources
Official source: GameWatcher unit database ↗
Keep reading
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