Endless Mode is decided at the end of each six-day cycle, not in the deepest room the team manages to open. Days 1–3 establish one treasure target, Days 4–6 raise it, and Day 6 adds a boss. The important choice is whether that boss is necessary at all: if the quota is already met, the developer says the team can enter and leave the boss day without winning the fight and still advance.
Version boundary: this guide covers the Cursed Companions 1.0 full release, checked August 12, 2026. It uses the developer’s official Endless rules and current Steam achievements. It does not assume a permanent monster tier, fixed quota number, or guaranteed boss order.
Read one cycle as two three-day budgets
The official structure gives each cycle a natural midpoint. Days 1–3 ask for the initial target. Days 4–6 replace it with a higher target, and the sixth day selects its boss encounter from the first two acts. After the Day 6 requirement is satisfied, the next cycle begins on Day 7; the pattern returns on Days 12, 18, and every sixth day after that.
Keep a shared ledger with five live facts: the active target, value already stored, value waiting near an exit, recovery tools on the island, and the condition of each role. Do not write down a quota copied from a guide. Targets have been rebalanced during development and continue to scale; the current objective panel is the only number the decision needs.
Use the first half of the cycle to build options:
- Return a working Spell Book, healing, control, and a reliable escape tool rather than spending everything for a larger Day 2 haul.
- Stage treasure at a known dungeon boundary so a runner can shorten the dangerous part of the trip.
- Identify the recurring failure—navigation, curse damage, monster control, or voice recognition—and purchase for that problem before the target rises.
Days 4 and 5 are not merely “the same, but harder.” They are the window for solving the larger target before a boss complicates Day 6. If the team enters the last day with both a quota shortfall and an injured roster, it has already combined two separate risks into one mandatory run.
Turn Day 6 into a choice instead of a surprise
Winning the Day 6 fight produces a Queen’s Hand. To find its treasure value, divide the current target by three. The developer illustrated that rule with 18 becoming 6, but the live ratio—not that old example number—is what the decision needs. Compare the resulting reward with the shortfall still shown in the objective.
| Team state | Day 6 choice | Reason | Check before committing |
|---|---|---|---|
| Target already met; tools or upgraded players are at risk | Enter and exit | Official rules allow progression without the kill when the quota is solved | Confirm the live target is complete before leaving |
| Shortfall is no greater than the Queen’s Hand value | Fight if the roster is stable | The boss reward can close the target without another treasure route | One reader, one backup, recovery item ownership, safe voice inputs |
| Target unmet and boss reward would still leave a gap | Collect first | A boss victory would not solve progression on its own | Define the exact shortfall and return threshold |
| Achievement or variant objective requires the kill | Fight deliberately | The encounter itself is the goal, not merely cycle survival | Accept the saved-run risk before opening the arena |
Skipping is not a failed boss attempt. It is the mode’s cleanest risk conversion: the team exchanges a possible reward for preservation of the day, equipment, and player upgrades. Fighting is correct when the reward solves a real shortage or the encounter is the chosen objective. Fighting only because the gate exists is how long runs become short stories.
Make the island the save file you can see
Portal closure at day’s end creates the Endless checkpoint. That checkpoint records the day number and team abilities together with any equipment or treasure that reached the island. Continue loads this state; choosing a new Endless run replaces the prior save.
Run a closing audit before the portal shuts:
- Confirm that the current target actually registered.
- Name every high-value tool that made it back to the island.
- Separate quota treasure from equipment reserved for the next cycle.
- Record which player owns each restored-stat potion.
- Do not select New Run until the host states that overwriting the saved run is intentional.
The save cannot preserve an item abandoned in an unfinished dungeon. That makes a late retreat more valuable than a late discovery. When a critical control or revival item crosses the portal home, the next session inherits an option; when it stays with a lost player, the next session inherits only the higher day.
Restore the correct player from the correct Soul Potion
Each Soul Potion represents one player’s stored statistics. The bottle can preserve inventory capacity and forbidden-word state alongside health, stamina, and other upgrades. Because any companion may drink any bottle, the game does not protect a build from a hurried teammate.
Assign ownership before anyone drinks. Use player names, a consistent storage position, and a text note if the group is resuming later. Then restore the roles that the cycle plan actually needs: the porter’s capacity, the runner’s stamina, the medic’s survival state, or the bookkeeper’s known curse burden.
The failure signal is “we will sort it out after everyone drinks.” At that point, a high-capacity potion can land on the player who never carries treasure, while the intended owner receives unfamiliar forbidden words and less room for tools. Stop at the island, match potion to person, and make the next dungeon inherit the team that earned the save.
Use revival to create an anchor, not another scattered player
Version 1.0 added two recovery paths suited to long runs. Dead players can repeatedly roll the Respawn Dice in spectator mode until they win a revival. Plan B destroys itself to revive its carrier automatically. Both systems return the player beside a random living companion, or to the home island if no companion can be located.
That placement rule changes team movement. When a spectator begins rolling, one healthy pair should become the anchor in a cleared area while the rest stop opening new branches. If the returned player appears beside that pair, the team can restore their role and route immediately. If every survivor runs in a different direction, the same random return can place the revived player beside the least stable member.
Count Plan B as insurance, not quota capacity. Its existence does not make a side room cheaper; it prevents one death from erasing a valuable player state. After it triggers, lower the next room’s risk until another recovery option is secured.
Spend long-run tools on failure modes, not on novelty
The developer groups several systems with late-stage and Endless survival: Wayhome Stones and the Summoning Staff, plus Teleportaloo, Healing Baths, and Teleport Circles. Their shared value is compression: they reduce travel, recovery time, or exposure that would otherwise repeat every day. Buy the facility that removes the failure your ledger keeps recording.
Full release also changed several tactical tools. An Ice Wand or Boomer Bomb now holds a monster in place rather than applying the former slow. The upgraded Spell Torch warns about dangerous entrances; it also destroys Mannequins and unlocks Grumble Chests. Those effects are strongest when they protect a return path or prevent a bad room from consuming health and revival resources. A freeze spent after the porter is already trapped is an emergency; a freeze reserved to move the porter through the exit is a plan.
Avoid permanent tier lists. A tool’s value changes with the active target, the group’s current curses, and the next boss choice. The same control item can be expendable on Day 2 and the reason a Day 12 save survives.
Expect Antoinette variants without assuming a fixed rotation
Challenge and Endless can use the full-release Antoinette variants. Official descriptions establish the hazards, but not a permanent schedule:
- Blight Antoinette infects players and can turn fallen teammates into additional Blightwalkers. Protecting a downed-player plan matters more than chasing a fast damage window.
- Poison Antoinette creates poison pressure. Confirm the day’s healing inputs and keep the medic’s voice clear before engaging.
- Ice Antoinette reduces movement speed, which becomes worse when faster creatures join the room. Preserve spacing and control before the slow lands.
- The Twins replace one boss with two. Split attention only after the team has assigned who tracks each threat.
- Insane Antoinette draws a random status package from the other variants. Enter with a flexible response rather than one counter built around a predicted element.
Current Steam achievements confirm variant kills in Challenge or Endless, but an achievement is not evidence of a guaranteed Day 6 order. Read the live arena, current guide entry, and actual status effect before consuming the tool meant to answer it.
Use achievement days as audits, not permission to overreach
The current Steam list places checkpoints at Days 4, 7, 10, 13, 16, 19, 22, 25, and 28. Day 16 awards the Centurion skin, while Day 28 awards the Chinese Emperor skin. These are useful planning marks because they sit just after or inside later six-day cycles; they do not change the rule that a living, equipped team is the real asset.
At each checkpoint, audit one layer:
- After Day 4: can the group track the larger second-half target without guessing?
- After Day 7: did the first boss choice preserve enough tools to begin again?
- At Days 13 and 19: did the restored Soul Potions recreate the intended roles?
- Before Days 16 and 28: is the group protecting the milestone, or inventing extra risk because it is close?
A milestone attempt should become more conservative as it approaches. Bank the target, close the portal deliberately, and let the achievement register. There is no bonus for carrying a record run into one unnecessary room.
Close every cycle with one explicit call
Before Day 6, one player states the choice in a complete sentence: target status, expected Queen’s Hand value, boss goal, and retreat plan. Before the portal closes, another player states what the save will contain. Before Continue, potion ownership is confirmed. Those three calls prevent the most expensive Endless failures: fighting a boss the quota did not require, saving without the equipment the next cycle needs, and restoring the wrong build.
The durable Endless route is therefore a loop of decisions, not a map: solve the first target, build a reserve, solve the second target, choose the boss by arithmetic and team condition, verify the island state, then restore the right people. Repeat it on Days 6, 12, and 18 without assuming the next cycle owes the team the same rooms, monsters, or easy words.
Sources and credits
Cycle rules, saving behavior, Soul Potions, revival systems, Antoinette variants, achievement milestones, release timing, and official imagery were checked against the Cursed Companions Steam page, Crimson Forge Studios announcements, and the official press kit. Readable community guides were used only for decision framing; unsupported day-by-day scaling, fixed tier claims, and disputed act labels were not adopted.