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Build a Base and Steal Guide
Strategy

Player Setups

The two entity systems (pets and gear) plus the three setups players actually run: earnings, raid, and defense - with the newest system, Clans, covered in date-order.

Checked 2026-10-06Clan system live; [CLANS🛡️] tag off since Oct 6

Entities in this game: pets and gear

Build a Base and Steal has two entity systems. Pets are the earning entities - every one generates Cash per second, and quality multiplies that rate. Gear is the player-side entity set, granted by the rebirth ladder.

The documented pet set spans 30 named entries from farm animals (Cat, Chicken, Bunny) through dinosaurs (Stegosaurus, Mammoth, Velociraptor, YiQi) to mythicals (Sphinx, Pegasus, Roc, Hydra, Qilin, Simurgh, Dragon, Unicorn, Fairy, Mermaid), plus Golden variants (Golden Kitsune, Gold Unicorn, Gold Dragon).

The gear set spans 26 tools across the same 16 tiers: the bat damage line (Steel, Stone, Cobalt, Obsidian, Crystal, Golden, Goku, Sky, Galaxy, Rage, Hacker, Demon), mobility (Speed Coil, Gravity Coil, Dual Coil, Grapple Hook), utility (Shrink Potion, Body Swap Potion, Invisibility Cloak, Flashbang), defense (Bear Trap, Juggernaut), and endgame raid tools (TNT, Magnet, Sniper Rifle, Ban Hammer).

The earnings setup

An earnings build maximizes per-second income: the largest roster your pet slots allow (each rebirth adds +2 slots), mutation multipliers on the best earners, and the pet Index pushed by collecting new species.

Mutation placement is the highest-leverage decision: a Cosmic (2x) or Inferno (3x) mutation belongs on your highest-income pet, and Admin (4x) on whichever earner you will keep longest. One mutation per pet - no stacking - so placement order matters.

The overnight version of this setup is the offline engine: a full, well-defended base keeps earning while you sleep, officially confirmed by the page's own description.

Reference

The two entity tables

Everything the game asks you to hold and everything it hands you.

Species named in the published rebirth requirements
Named petsCount
Cat, Chicken, Bunny, Bat, Owl, Llama, Zebra, Elephant, Lion, Stegosaurus, YiQi, Mammoth, Velociraptor, Azhdarchid, Gargoyle Bat, Cockatrice, Sphinx, Pegasus, Roc, Hydra, Qilin, Simurgh, Dragon, Unicorn, Golden Kitsune, Gold Unicorn, Gold Dragon, Gnome, Fairy, Mermaid30 entries (29 unique species per Pro Game Guides)

Source: Sportskeeda rebirth table + Pro Game Guides pet-count summary. Checked 2026-10-06.

Gear unlocked through the rebirth ladder
GearRoleUnlocked at
Steel Batbasic base-breaking meleeRebirth 1
Speed Coilfaster travel for raid runsRebirth 1
Gravity Coilhigher and softer jumps over defensesRebirth 2
Stone Batearly bat upgradeRebirth 3
Cobalt Batmid-tier bat upgradeRebirth 4
Dual Coilcombined speed and jump mobilityRebirth 5
Grapple Hookpull yourself over walls and gapsRebirth 6
Obsidian Batlate-mid bat upgradeRebirth 7
Bear Trapplaceable defense against raidersRebirth 8
Crystal Bathigh-tier batRebirth 9
Juggernautheavy raid toolRebirth 9
Golden Batpremium batRebirth 10
Shrink Potionshrinks targets or self for tricksRebirth 11
Goku Batmeme-tier strong batRebirth 12
Invisibility Cloakapproach raids unseenRebirth 12
Sky Bathigh-mobility batRebirth 13
Body Swap Potionswaps positions for escapesRebirth 13
Galaxy Batendgame batRebirth 14
Rage Batendgame bat variantRebirth 14
Hacker Batendgame batRebirth 15
Ban Hammerendgame raid toolRebirth 15
Flashbangdisorients defendersRebirth 15
Demon Battop-end batRebirth 16
TNTexplosive base-breakingRebirth 16
Magnetpulls pets or lootRebirth 16
Sniper Rifleranged raid optionRebirth 16

Source: Sportskeeda rebirth guide reward table (2026-07-25). Checked 2026-10-06.

The raid setup

A raid build carries the tier-appropriate bat plus one mobility tool (coils early, Grapple Hook from tier 6), with the endgame adding TNT for walls, Magnet for the carry, and Sniper Rifle for reach.

Stealth options change the approach: the Invisibility Cloak (tier 12) covers the walk-in, and the Body Swap Potion (tier 13) is the escape hatch when the owner returns. The Flashbang (tier 15) covers the getaway.

Whatever the loadout, the raid build's first requirement is a sealed home base - the checklist is a free pet slot, walked route, and layered home defense before any gear matters.

The defense setup

Defense builds spend Cash on layout instead of roster: no straight approaches, two-plus layers around pet rows, and requirement pets deepest. Permanent defense blocks (+3 per rebirth tier) are the foundation that purchased walls stack onto.

The Bear Trap (tier 8) converts a predictable entry path into damage, and the Juggernaut (tier 9) gives the owner a heavy body to chase with. Both come free from the ladder, which is why defense scales with progression without extra spending.

Event windows adjust the defense build: abduction events (Cosmic Invasion) put part of the roster in transit, so the standing setup protects whatever remains while maximizing mutation exposure.

Clans: the newest system

The clan system is live in the current build - it shipped with the August 30, 2026 build, whose [CLANS🛡️] storefront tag ran late August through October 3 and was off by the October 6, 2026 check. Tracker coverage brackets the rollout: Pro Game Guides carried the [CLANS] title on August 21, 2026, and Try Hard Guides listed the game as [Clans] in August 2026.

Detailed clan mechanics - ranks, shared perks, group rewards - had yet to appear in a creator-owned document at the 2026-10-03 source pass, so treat clan specifics as they appear in the live clan menu rather than copying third-party summaries.

For build purposes, clans matter as organized raid partners and defense pacts: the group systems that usually follow the tag (coordinated events, group identity) fit the game's team-vs-team map structure.

Clans

The newest system, in date order

the clan system shipped with the August 30, 2026 build, whose [CLANS🛡️] storefront tag stayed up through the October 3 recheck and was removed by the October 6, 2026 check, when the official API returned the plain name Build a Base and Steal😈 with 95.5 million recorded visits; the in-game clan layer itself has not been reported removed

tracker coverage brackets the rollout: Pro Game Guides carried the [CLANS] title on 2026-08-21 and Try Hard Guides listed the game as [Clans] in August 2026; the tag's removal on 2026-10-06 closes the storefront phase the same record tracks.

no coin-boost percentage, clan-level table, quest list, or reward value had appeared in a creator-owned document by the October 6, 2026 source pass, so this site describes clans as live and links the official page and in-game clan menu as the check points.

Source: Official Roblox API (2026-09-28, 2026-10-03 and 2026-10-06 checks) + Pro Game Guides (2026-08-21) + Try Hard Guides (August 2026) + announcement-mirror wording.

FAQ

Setup questions

What is the best pet setup for earning?

Maximum slots (rebirth adds +2 per tier), mutation multipliers on the strongest earners (Golden 1.5x through Admin 4x), and Index progression for the permanent collection bonuses.

What gear should a raid build carry?

The tier's best bat plus a mobility coil; from tier 6 add the Grapple Hook, and the endgame kit adds TNT, Magnet, Sniper Rifle, Flashbang, and the Invisibility Cloak for approach.

How do I build a defensive base?

Layer walls with no straight approaches, place requirement pets deepest, add Bear Traps on likely entries, and let the +3-per-tier defense blocks accumulate through rebirths.

What are clans?

The group system that shipped with the August 30, 2026 build. Its [CLANS🛡️] storefront tag was live from late August through the October 3 recheck and was gone by the October 6, 2026 check, but the system itself has not been reported removed; check the in-game clan menu for current rules.

Do pet stats exist?

The documented numbers are the mutation multipliers and the rebirth requirement table; per-pet stat sheets have yet to be published by the developer, so in-game displayed values remain the working truth.

Next checks

Related pages

Rebirth ladder

Where every gear unlock comes from.

Mutations table

The multipliers behind earning setups.

Raid readiness checklist

Check the raid build before leaving home.

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