Claude Opus 5 helped me build this partial list
Cannot be emptied: 106 types
The game refuses to start without at least one prototype of each of these.
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accumulator, arithmetic-combinator, arrow, artillery-turret, artillery-wagon, beacon, blueprint, boiler, burner-generator, car, cargo-wagon, character, character-corpse, cliff, constant-combinator, construction-robot, container, copy-paste-tool, curved-rail-a, curved-rail-b, decider-combinator, deconstructible-tile-proxy, display-panel, editor-controller, electric-energy-interface, electric-pole, electric-turret, elevated-curved-rail-a, elevated-curved-rail-b, elevated-half-diagonal-rail, elevated-straight-rail, entity-ghost, equipment-ghost, equipment-grid, fish, fluid-wagon, gate, generator, god-controller, gun, half-diagonal-rail, heat-interface, heat-pipe, highlight-box, infinity-cargo-wagon, infinity-container, infinity-pipe, inserter, item-entity, item-group, item-request-proxy, item-subgroup, lab, lamp, land-mine, lane-splitter, legacy-curved-rail, legacy-straight-rail, linked-belt, linked-container, loader, loader-1x1, locomotive, logistic-container, logistic-robot, map-settings, market, mining-drill, noise-expression, offshore-pump, pipe, pipe-to-ground, power-switch, programmable-speaker, proxy-container, pump, radar, rail-chain-signal, rail-ramp, rail-remnants, rail-signal, rail-support, reactor, remote-controller, roboport, rocket-silo, rocket-silo-rocket, rocket-silo-rocket-shadow, selector-combinator, simple-entity-with-force, simple-entity-with-owner, solar-panel, spectator-controller, speech-bubble, spider-vehicle, splitter, storage-tank, straight-rail, tile-ghost, train-stop, transport-belt, turret, underground-belt, upgrade-item, valve, wall
Can be emptied: 73 types
The game loads with the category present but empty.
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achievement, agricultural-tower, ambient-sound, ammo, assembling-machine, battery-equipment, belt-immunity-equipment, blueprint-book, build-entity-achievement, cargo-bay, cargo-landing-pad, change-surface-achievement, combat-robot-count-achievement, complete-objective-achievement, construct-with-robots-achievement, create-platform-achievement, custom-input, deconstruct-with-robots-achievement, deconstruction-item, deliver-by-robots-achievement, deliver-impact-combination, deplete-resource-achievement, destroy-cliff-achievement, dont-build-entity-achievement, dont-craft-manually-achievement, dont-kill-manually-achievement, dont-research-before-researching-achievement, dont-use-entity-in-energy-production-achievement, electric-energy-interface-equipment, energy-shield-equipment, equip-armor-achievement, furnace, fusion-generator, fusion-reactor, generator-equipment, group-attack-achievement, gui-style, inventory-bonus-equipment, item-with-entity-data, kill-achievement, map-gen-presets, module-transfer-achievement, mouse-cursor, movement-bonus-equipment, night-vision-equipment, place-equipment-achievement, player-damaged-achievement, produce-achievement, produce-per-hour-achievement, repair-tool, research-achievement, research-with-science-pack-achievement, segmented-unit, selection-tool, shoot-achievement, shortcut, solar-panel-equipment, space-connection, space-connection-distance-traveled-achievement, space-platform-starter-pack, spidertron-remote, sprite, surface, thruster, tile-effect, tips-and-tricks-item, tips-and-tricks-item-category, train-path-achievement, use-entity-in-energy-production-achievement, use-item-achievement, utility-constants, utility-sounds, utility-sprites
Undetermined: 72 types
For these, a reference somewhere else fails the load before the engine gets as far as counting prototypes, so the question never gets asked. They may or may not need a survivor.
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active-defense-equipment, airborne-pollutant, ammo-category, ammo-turret, armor, artillery-flare, artillery-projectile, asteroid, asteroid-chunk, asteroid-collector, autoplace-control, beam, burner-usage, capsule, capture-robot, cargo-pod, chain-active-trigger, collision-layer, combat-robot, corpse, damage-type, delayed-active-trigger, deliver-category, equipment-category, explosion, fire, fluid, fluid-turret, font, fuel-category, impact-category, item, lightning, lightning-attractor, module, module-category, noise-function, optimized-decorative, optimized-particle, particle-source, planet, plant, procession, procession-layer-inheritance-group, projectile, quality, rail-planner, recipe, recipe-category, resource, resource-category, roboport-equipment, segment, simple-entity, smoke-with-trigger, space-location, space-platform-hub, spider-leg, spider-unit, sticker, stream, surface-property, technology, temporary-container, tile, tree, trigger-target-type, trivial-smoke, tutorial, unit, unit-spawner, virtual-signal