Endless Mode Survival and Scaling Guide

You know the run: the regular victory is almost secured, Supply is finally flowing, and the reward screen offers three buildings that solve absolutely none of tomorrow’s problems. Then Endless begins, armored bodies hide a pack of splitters, and your beautiful kill zone becomes alien rush-hour traffic. The fix is to enter Endless with the final package already under construction. Do not wait for the victory screen to start one.

This strategy covers Tower Dominion on Windows PC, version 1.66, checked July 13, 2026. Version 1.66 makes Endless pressure rise earlier and progress faster than older builds. The wave ranges below are working checkpoints, not fixed enemy schedules. Maps, rewards, threats, doctrines, and useful terrain still vary. Tower Dominion GO is a separate mobile adaptation and is not covered here.

How Endless Starts

After winning War once, Endless becomes available from the victory screen on any standard difficulty. Finish the regular expedition, then choose Endless Mode instead of ending the run. War is Difficulty IV: it has four battlefronts and its normal victory comes after wave 35. An entry point is a place where foes enter the map. A battlefront is a separate connected route leading to Headquarters, or HQ.

Foes are spread across the available entry points. For a main-lane layout, keep several entry points feeding one long route and only one entry point on each shorter battlefront. That sends more traffic through the route covered by your best guns; path length alone does not command every foe. In PC version 1.66, wave 103 remains the practical endpoint because later foes stop spawning. Treat that as current PC behavior, not a permanent record or a promised destination.

Three Example Packages

Example and exact setup	Scalable package	Fallback if the draft misbehaves
Range and control: PC 1.66, War/Difficulty IV, Lions of Ravelski, Archaeologist Karia. No Frontier modifiers. Complete wave 35, then select the faster-scaling Endless rules.	Karia starts with Xeno-Prognosis. Combine its support with Mission Controls beside Control Extensions, then add weapons with strong base damage or many targets. Rampart Missile Silos, Salamander Positions, Super Heavy Pulse Defenses, and Slovek Howitzers can fill that role.	If Mission Control is late, keep an Amplifier ready, save Tech for its first strong upgrade, and use Xeno-Prognosis, Tactical Fortresses, or artillery as the bridge. If the heavy weapons do not appear, build dependable mid-tier damage rather than hoarding yourself into a wave-36 funeral.
Artillery cleanup: PC 1.66, War/Difficulty IV, Iron Dragoons, Master of Ordnance Silnio. No Frontier modifiers. Complete wave 35, then select the faster-scaling Endless rules.	Silnio begins with one Light Mortar Position, Medium Mortar Position, Slovek Howitzer, and Sanction Cannon. Those four building types gain 50% reload speed. Use the armed Iron Dragoons HQ as an early bridge while adding Howitzers, Sanction Cannons, Ammo Depots, Omega Emitters, and Mission Control support.	If more Howitzers never arrive, let Sanction Cannons or Warwolf Positions work on large targets while the mortars clear split bodies. If the HQ is carrying too much, strengthen the inner bend before spending again on economy.
Blueprint-first lattice: PC 1.66, War/Difficulty IV, Pargan Assault Group, Colonel Eleonor. No Frontier modifiers. Complete wave 35, then select the faster-scaling Endless rules.	Eleonor receives a blueprint-only choice every other wave, and tier-2 and tier-3 blueprints are 20% more likely to appear. Use that flow to hunt Mission Controls, Control Extensions, Salamanders, Rampart Missile Silos, or Super Heavy Pulse Defenses, then arrange the useful pieces in compact support clusters.	If damage arrives before Mission Control, place only enough copies to survive and keep drafting. If Mission Control arrives first, take its economy and blueprint options before filling every platform. Keep real damage around the Pargan HQ; it is not an Iron Dragoons fortress wearing green paint.

These are examples, not mandatory builds. A long-run package needs strong base damage, enough targets or area coverage for crowds, and a bonus that keeps multiplying or growing. Commander powers, Control Extensions, range bonuses, Air Command support, battlefront effects, and stacking doctrines can provide that third piece.

Reach Wave 35 Without Gutting the Endless Build

Tower Dominion has three main currencies. Supply buys most buildings and upgrades. Recon pays for terrain rerolls and some specialist buildings or upgrades. Tech is rarer and buys powerful upgrade branches. A blueprint is one building copy you may place, while a doctrine grants a run-long bonus or special delivery. Endless punishes a run that spends every currency and blueprint as though wave 35 were the only bill coming due.

Early regular run: Build one dependable damage line and the minimum answers for air, camouflage, shields, and armor. Upgrade towers with useful firing lanes before carpeting the map with weak blueprints.
Middle regular run: Add Supply or Recon production only after the next revealed threat is covered. Reserve at least one central platform for a large support building or heavy weapon.
Late regular run: Add a second answer for any trait that could end the run. Save Tech for upgrades that support the chosen package. Stop buying temporary towers merely because their blueprints are available.
Before wave 35: Check the HQ approach, repair if needed, and cover the inner bend with detection plus general damage. Do not remove a bridge defense until its replacement is built, upgraded, and covering the same route.

A temporary investment is fine when it clears a real blocker. A cheap Mirador with Detection that stops a camouflaged leak is doing honest work. A seventh unrelated weapon family placed because the platform looked lonely can dilute the building doctrines you actually want later.

Endless Checkpoints

Working checkpoint	What should be working	Warning sign	Immediate action
Early damage, about waves 36–50	The main package kills ordinary threats before the final bend. Detection, anti-air, shield damage, and armor damage overlap somewhere on the route.	Ordinary foes reach the HQ approach, or one tower supplies nearly all damage.	Pause economy spending. Upgrade the carry tower, support it, and add cleanup damage at the inner bend.
Supply transition, about waves 45–60	Supply income pays for core upgrades without several waves of saving.	You hold useful blueprints but cannot place or upgrade them.	Take Supply production, activate an economy building, or use Mission Control’s economy branch. Do not burn all Recon chasing one dream tower.
Blueprint transition, often after wave 55	Mission Control, extra blueprint drafts, or an early Xeno-Extractor keeps useful building choices entering the run.	Supply piles up while rewards offer only unrelated buildings or doctrines.	Favor blueprint generation over another small currency reward. Use Amplifiers to raise the odds of a needed building family and Attenuators to reduce unwanted families.
Splitter check, roughly waves 62–85	A dedicated cleanup group catches Omega Mucus Splitters after larger bodies stop drawing the heavy guns.	Large foes die, then a spray of smaller bodies advances during an empty firing cycle.	Build a cleanup pocket after the heavy-fire zone. Use Salamanders, Silnio’s Light Mortars, an isolated Howitzer, Iron Dragoons infantry, Retribution volleys, or a long slowed lane covered by Warwolves.
Late health scaling, often from the mid-80s	Your best weapons cover a large share of the active route, and their damage continues growing through support, doctrines, commander effects, or battlefront bonuses.	The same route takes longer to clear each wave even though no trait counter is missing.	Stop adding small generalists. Stack support around the best high-base-damage, high-target weapons and improve their coverage of the outer route.

Build a Splitter Cleanup Pocket

Omega Mucus Splitters are a targeting problem before they become a raw damage problem. Many heavy weapons prefer larger or higher-HP targets. The damage chart can look heroic while the small split bodies stroll underneath the fireworks.

ENTRY POINT → shield damage / slow → heavy-target guns → SPLITTER CLEANUP → inner bend → HQ
                                                    mortar, flame, missiles, infantry
SECOND LAYER → detection + anti-air coverage ───────────────────────────────────────┘

When the threat preview shows splitters, place the cleanup pocket after the part of the route where heavy guns first break the larger bodies apart. The pocket needs area damage, several targets, or a quick firing cycle. If giant targets share the route, aim an isolated Howitzer or mortar down that lane so every health bar on the map cannot distract it.

Splitting group: Salamanders, mortars, Retribution volleys, infantry, and multi-target weapons can catch newly created bodies. A slowed Warwolf lane gives slower guns another firing cycle.
Camouflaged group: overlap Detection near the outer kill zone and again near the HQ. A Mono-Dissector, the Mirador Detection upgrade, or Air Command bomber coverage can provide a backup layer.
Shielded group: place weapons or upgrades with bonus shield damage before the main heavy cluster. Do not make every expensive shell chew the wrapper and the candy.
Flying group: keep a separate anti-air answer on the inner half of the route. A long ground maze does nothing to impress a foe that ignores it.
Armored or high-HP group: let high-impact guns work on the large bodies while the cleanup pocket handles the crowd created behind them.

If split bodies are already leaking, stop rerolling for a perfect answer. Remove one weak outer tower if it can be sold, place the quickest available area or multi-target weapon at the final bend, and upgrade its firing cycle. That recovery will not save every run, but it buys another draft and a fresh chance to make the alien traffic jam behave.

Pathing Changes During a Long Run

A long route creates firing time, but path length is only useful when your weapons can cover it. As platforms and range become scarce, stop extending decorative corners that only one gun can reach. Spend later terrain on shared firing lanes, usable platforms, and sight lines that let several weapons attack the same traffic.

One merged battlefront: this is easier to cover during the regular run, but it gives up bonuses that scale with the number of open battlefronts.
Four open battlefronts: these are harder to stabilize, but Control Extensions and several other effects become stronger. Feed several entry points into one long main route, leave only one on each secondary route, and give every short route enough defense that an elite cannot appear beside the HQ.
Pits: a pit appears when a path becomes a fully enclosed dead end. Reveal useful pits early when the terrain allows, but do not wreck the main lane chasing one. An early Xeno-Extractor can add special buildings and help push blueprint growth.
Terrain expansion: use early tiles to create firing time and safe bends. Use later tiles to find flat building space, connect support clusters, and improve shared coverage.
Exhausted building space: reserve central, level platforms for Mission Controls, Control Extensions, Air Commands, and large weapons. Fit smaller towers around the rim. Remove an obsolete bridge tower only after checking whether it supplies Detection, slowing, repair, or another support effect.

A clean late layout usually has three layers: heavy weapons and HQ coverage inside, Mission Controls and Control Extensions in a compact middle cluster, then long-range fire and splitter cleanup toward the outer route. If the terrain refuses that shape, build two smaller clusters with overlapping coverage. Awkward tiles are not failed tiles; they are merely requesting a little battlefield engineering.

Long-Session Performance and Patch Limits

Very long PC sessions can become CPU-heavy during massive waves. Tower Dominion has received several pathfinding, speed-control, and Endless performance passes, but late runs can still slow down. Favor a smaller number of upgraded damage carriers over rows of low-impact towers, and avoid adding troop-producing buildings merely to fill empty space. Test the faster speed early in a wave instead of assuming it will remain smooth throughout the session.

Use the damage display between waves to find buildings that have stopped helping. Clearing weak, sellable towers reduces clutter and opens valuable platforms. If controls or targeting begin to lag, pause before editing terrain and resume at a lower speed. Endless pacing, performance, and balance have changed across patches, so judge the run by whether its package still scales—not by an old wave number or a permanent-record promise.

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