Guide · Rules & Modifiers
Cobb Can Move Rules & Modifiers Explained
The changing rules are the whole game. This page covers every modifier Cobb can roll, how to recognise it in the first ten seconds, the counter that actually works, and the four distinct ways a run can end.
Last updated July 27, 2026 · documented against v1.7
What "the rules change" actually means
Cobb Can Move does not have fixed levels. Each level generates a fresh dungeon — rooms, light sources, breakers and exit — and then rolls a rule: a modifier that changes how Cobb hunts you, and sometimes a debuff that changes how your own body behaves.
This is why the game resists muscle memory. A route that saved you last level can kill you this level, because the thing chasing you now works differently. The rule banner that appears before you gain control is not flavour text — it is the single most important piece of information in the level.
There are six Cobb modifiers and two player debuffs. A level can roll a modifier alone, or a modifier plus a debuff. The final level of the Story campaign adds an extra rule on top of whatever it already had, which is why the finale feels disproportionately hard.
Read before you move
The rule is shown before Cobb becomes active. Those few seconds are free — spend them deciding your route, not walking it.
How rules are dealt out
- Level 1 eases you in — you can expect to learn the coal-and-furnace loop without a hostile modifier fighting you.
- Level 2 is guaranteed to give you a sensory rule: HEAR, SEE or SMELL. It is the game teaching you that Cobb has senses, and that they differ.
- Levels 3–6 roll freely from the full pool, and this is where modifier-plus-debuff combinations start appearing.
- Level 7 is the finale. It adds a rule on top of the one already in play, and it changes the objective — you are no longer just leaving, you are finishing something.
- Endless mode starts at level 3 and keeps rolling indefinitely. Since v1.3 it deliberately skips the two tutorial levels, so the pressure begins immediately.
Because generation is procedural, two players on the same level number will not see the same dungeon or necessarily the same rule. Comparing seeds with a friend is part of the fun; expecting a fixed walkthrough is not going to work.
The six Cobb modifiers at a glance
| Rule | What changes | Your counter |
|---|---|---|
| HEAR | Cobb tracks noise you make | Move in short bursts; throw rocks away from your route, never near it |
| SEE | Cobb commits the moment it has line of sight | Break sight lines with walls and corners; darkness is cover, not danger |
| SMELL | Cobb follows the trail you have already walked | Never double back; loop forward through fresh ground |
| REACH | Grab range extends well past its sprite | Add a full extra tile of clearance at every corner |
| DUPLICATE | More than one Cobb hunts the level | Shorten every trip; abandon greedy coal runs |
| FASTER | Cobb's movement speed increases | Stop trying to outrun it; use rock stuns and lit rooms instead |
Every modifier in detail
The table above is the summary. What follows is what each rule actually feels like at the controller, including the mistake that most often ends the run.
HEAR — Cobb tracks your noise
Under HEAR, the sounds you generate become a beacon. Movement, dropping coal, and above all thrown rocks pull Cobb toward the source. Since v1.6 rocks are audibly loud, which was a deliberate design change: the developer made the noise obvious so the mechanic stops feeling like a hidden punishment.
- How you spot it: Cobb changes heading toward you when there is no possible line of sight.
- The counter: move in short bursts with pauses. A rock thrown *away* from your route is a genuine tool here — it is the one rule where distraction throwing pays for itself.
- The mistake: panicking and throwing a rock while Cobb is already close. Under HEAR that is an invitation, not an escape.
SEE — line of sight is a commitment
SEE turns the level's geometry into the whole puzzle. Cobb does not wander toward a guess; the moment it can see you it commits and closes. The counterintuitive part is that light — normally your lifeline — becomes a liability when it puts you in an open, sighted room.
- How you spot it: Cobb goes from idle to a direct, unwavering line the instant you cross an open space.
- The counter: plan routes along walls and through doorways that break sight. Cross open rooms only when you know where Cobb is.
- The mistake: lighting every room on reflex. Under SEE, an unlit corridor you already know is safer than a bright one you have to cross.
SMELL — your own path hunts you
SMELL is the rule most players lose to without understanding why. Cobb follows where you have been. Every backtrack lays a fresh, strong trail directly onto your current position, which is exactly what a coal-gathering loop makes you do.
In v1.7 the developer nerfed this rule — sniffs are less frequent, and Cobb is less persistent when it smells you at close range. It is meaningfully more survivable than it was in v1.6, but it still punishes retracing harder than any other modifier.
- How you spot it: an audible sniff, and Cobb arriving at somewhere you *were* rather than where you are.
- The counter: route in loops, not in lines. Pick up coal on a circuit that ends at the furnace instead of shuttling back and forth.
- The mistake: the classic double-back for one more piece of coal. Under SMELL that trip is where runs die.
REACH — the grab is longer than it looks
REACH does not change Cobb's speed or senses. It changes the distance at which it can take you, and it does so without changing the sprite — so your eyes keep telling you a gap is safe when the hitbox disagrees. This rule kills confident players specifically.
- How you spot it: you die at a distance that would have been fine last level.
- The counter: deliberately over-give clearance. Take corners wide, and never squeeze past Cobb through a doorway.
- The mistake: trusting the animation instead of the rule banner you read thirty seconds ago.
DUPLICATE — more than one Cobb
DUPLICATE removes the assumption every other rule lets you keep: that once you know where Cobb is, the rest of the level is clear. With multiple pursuers, no room is confirmed safe just because you can see one of them.
- How you spot it: two threats visible at once, or a grab from a direction you had already cleared.
- The counter: shorten everything. Fewer coal trips, more direct routes, accept a dimmer level in exchange for fewer crossings.
- The mistake: playing it like a single-Cobb level and tracking only the one you can see.
FASTER — you cannot win a race
FASTER is honest about what it does, and players still try to outrun it. You cannot. What you can do is remove the need to run: since v1.6, a direct rock hit stuns Cobb for a short period, and that stun is worth far more under FASTER than under any other rule.
- How you spot it: the rule banner, and the fact that your usual escape distance evaporates.
- The counter: hold a rock as insurance rather than throwing it as a distraction. Keep the rooms on your escape route lit so you are never navigating blind at speed.
- The mistake: spending your rock early on a distraction throw and having nothing left when it closes.
The two player debuffs
A level can also apply a rule to *you*. Debuffs do not change Cobb at all — they put a clock on the level, which changes every routing decision you make.
Debuffs stack on top of modifiers
A debuff never replaces a Cobb modifier — it is added to it. FREEZE plus SEE, or STARVE plus SMELL, are genuinely different problems from either rule alone.
FREEZE
Cold pressures you toward heat. Lit furnaces and fires stop being purely a navigation tool and become a survival requirement, which means the level's light layout now dictates your route rather than merely assisting it. Staying out in unlit space too long ends the run.
STARVE
Hunger puts carrots on your critical path. Since v1.3 carrots respawn after being eaten, so a level is not lost the moment you use the ones you can see — but you do have to fold their locations into your route instead of treating them as optional pickups.
The four ways a run ends
Cobb Can Move tracks four distinct causes of death, each with its own death sequence. Knowing which one is threatening you tells you which rule you mis-read.
| Cause | What went wrong | What to change |
|---|---|---|
| Caught by Cobb | You were within grab range — under REACH, further out than it looked | More clearance at corners; know where Cobb is before crossing open ground |
| Frozen | FREEZE was active and you spent too long away from heat | Route through lit rooms; light the path before you need it |
| Starved | STARVE was active and carrots were not on your route | Fold carrot positions into the coal circuit; they respawn, so plan a return |
| Killed at the furnace | The blast furnace sequence went wrong | Treat furnace feeding as a committed action — do it when you know Cobb's position |
This breakdown comes from the game build this site hosts: the shipped audio set contains four separate death cues — monster, freeze, starve and furnace — confirming they are handled as distinct outcomes rather than one generic loss state.
The combinations that actually kill
- SMELL + STARVE — the worst pairing in the game. Hunger forces you back to carrots; smell punishes exactly that backtracking. Plan a single circuit that collects carrots and coal in one direction.
- SEE + FREEZE — cold pushes you toward light, sight makes lit rooms dangerous. Move between heat sources along walls, and never linger in the middle of a lit room.
- DUPLICATE + FASTER — two fast pursuers. Give up on efficiency entirely: feed the furnace with the minimum coal that works and leave.
- REACH + anything dark — you cannot judge the gap you cannot see. Under REACH, light your escape corridor even if it costs you a coal trip.
Need the key map first? See the full controls reference.
The SMELL change in v1.7 is documented with every other patch in the update history.
Frequently asked questions
Every level rolls a new random modifier that changes how Cobb hunts you — by sound (HEAR), sight (SEE), smell (SMELL), grab range (REACH), by splitting into more than one (DUPLICATE), or by moving faster (FASTER). A level can also apply a debuff to you: FREEZE or STARVE. Reading that rule and adapting your route to it is the core of the game.
Six Cobb modifiers — HEAR, SEE, SMELL, REACH, DUPLICATE and FASTER — plus two player debuffs, FREEZE and STARVE. A level can combine one modifier with one debuff, and the Story finale adds an extra rule on top.
Most players find SMELL hardest, because the coal-gathering loop naturally makes you retrace your steps and that is exactly what it punishes. It was nerfed in v1.7 — fewer sniffs and less persistence at close range — but it still demands the biggest change to how you route a level.
Yes, since v1.6 a direct hit stuns Cobb for a short period. Before that update rocks worked only as a noise distraction, which is still useful — but the stun makes holding a rock in reserve the stronger play under FASTER and REACH.
Not the same rule, but always the same category: level 2 is guaranteed to roll a sensory modifier — HEAR, SEE or SMELL. It is the game's way of teaching you that Cobb's senses differ before the pool opens up.
Yes, the same pool applies, but Endless starts at level 3 rather than level 1, so you skip the gentler introductory levels and face full modifier-and-debuff combinations from the start.
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