ARTICLE LIBRARY
Browse 81 published guides by system, difficulty, content type, or topic. Start with What Is Screeps? A Programming Strategy Game or follow the beginner sequence through How to Combine Your First Screeps Room Loop.
Use a one-time Memory request, validate a visible room and 0–49 coordinates, allow Road placement on natural wall terrain, reject an existing Road or Construction Site, respect MAX_CONSTRUCTION_SITES, disable before createConstructionSite(), and verify later.
Learn what Screeps is, how JavaScript controls its persistent world, and how Rooms, Creeps, Sources, Spawns, and Controllers work together for new players.
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.
Filter FIND_DROPPED_RESOURCES for Energy, rank valid piles by collectible amount and path length, handle decay and changing targets, and inspect pickup() and movement results.
Find a Container that currently holds Energy, check the Creep's free capacity, call withdraw(), handle range and return codes, and keep the delivery task outside this focused guide.
Choose between getRangeTo(), inRangeTo(), isNearTo(), isEqualTo(), findClosestByRange(), findClosestByPath(), and findInRange() without confusing linear range with route reachability.
Confirm RCL 2, place one Extension Construction Site, make Builder1 harvest and build it, and understand progress, capacity, and common failure states.
Give Builder1 a clear priority: build owned sites, repair selected damaged structures, and upgrade the Controller when no higher task exists.
Inspect a misplaced Construction Site, validate its identity, submit remove() once, handle return codes, and verify the result on the next tick.
English articles are published only after source review, official API checks where applicable, JavaScript syntax review where code is present, duplicate-intent and link checks, and editorial review. Publication does not imply Console or multi-tick live-room verification; those evidence states remain separate in each guide. Review the verification method.