Screeps Creep.pull(): Coordinate Two Creeps in One Tick
Coordinate Creep.pull(), the puller's movement, and target.move(puller) in the same tick, handle adjacency and fatigue correctly, and verify the pair moved later.
TOPIC · 12 GUIDES
Movement Screeps guides
Focused English articles connected to movement, organized with the same filters used by the main article library.
Screeps Harvest Energy: Build Your First Creep.harvest() Loop
Use Creep.harvest() to find an active Source, move into range, keep harvesting until your Creep is ready to deliver, and read Source-specific return codes without treating ERR_FULL as a harvest result.
Screeps PathFinder.search(): Goal Range, Complete Paths, and the incomplete Flag
Call PathFinder.search() with the goal range your action actually needs, interpret path, ops, cost, and incomplete correctly, and reject partial paths before handing movement to a Creep.
Screeps moveTo() Returns OK but the Creep Stays Put
Verify movement over later ticks, then isolate fatigue, repeated movement intents, traffic, cached paths, room edges, and impossible stop ranges.
Screeps Source Selection: Complete Paths and Stable Assignments
Keep a valid Source identity, search only when reassignment is needed, reject incomplete PathFinder results, rank complete paths deterministically, and verify the selected harvest event.
Screeps CostMatrix 255: Why It Means Unwalkable
In Screeps PathFinder, a CostMatrix cost of 255 is unwalkable. See what 0, 1–254, and 255 mean, plus practical road, obstacle, and roomCallback rules.
Screeps ERR_NO_PATH: Diagnose Range, Matrices, and Routes
Separate ERR_NO_PATH from missing cached paths and incomplete PathFinder searches, then inspect goal range, CostMatrix rules, callbacks, limits, and room routes.
Screeps ERR_NOT_IN_RANGE: Use the Correct Action Range
Find the action that returned ERR_NOT_IN_RANGE, use its documented range, submit movement separately, and retry the action on a later tick.
Screeps Game.map.findRoute(): Plan and Execute One Room Step
Separate room planning from exit-tile pathfinding, validate the first route step, use finite risk costs versus hard bans, and verify the border transition on later ticks.
Screeps Creep Body Parts: WORK, CARRY, and MOVE
Inspect one Creep's active WORK, CARRY, and MOVE parts, then use its action result, Store, fatigue, and damage to diagnose missing abilities.
How to Calculate Screeps Creep Movement Speed
Calculate unboosted Creep movement from MOVE recovery, loaded body weight, road, plain, and swamp costs; account for empty CARRY parts; and separate a static body estimate from live multi-tick movement proof.
Which Screeps RoomPosition Distance Method Should You Use?
Choose between getRangeTo(), inRangeTo(), isNearTo(), isEqualTo(), findClosestByRange(), findClosestByPath(), and findInRange() without confusing linear range with route reachability.