Battle droid/Legends

A battle droid (also referred to as war droid or killer droid) was any droid designed for combat.

There were numerous types of battle droids. They predated the Galactic Republic by thousands of years, with the earliest known being Rakatan ancient droids and the war-robots used by Xim the Despot.

Many of the best known battle droids were those used by the Confederacy of Independent Systems during the Clone Wars.

At the end of the Clone Wars, Sith Lord Darth Vader turned off the Master control signal, deactivating the entire Separatist Droid Army. After this, battle droids were extremely rare.

Infinite Empire

 * Ancient droid
 * Defense droid

Hutt Empire

 * GX1-series battle droid
 * Hutt security droid
 * Hutt war droid

Xim the Despot's Empire

 * War-Robot

First Sith Empire

 * Sith Elite Warbot
 * Sith Sentry
 * Sith Slayer droid

Krath

 * Krath war droid

Mandalorians

 * Basilisk war droid

Galactic Republic

 * Mark I assault droid
 * Mark II assault droid
 * Mark IV assault droid
 * L8-L9 combat droid
 * SD-6 Hulk infantry droid
 * Sentinel droid

Sith Empire

 * War droid-series
 * Assault droid Mark I
 * Assault droid Mark II
 * Assault droid Mark IV

Confederacy of Independent Systems

 * A-DSD Advanced dwarf spider droid
 * A-series assassin droid
 * Air battle droid
 * Assault battle droid
 * B1 battle droid
 * B2 super battle droid
 * B2-HA series super battle droid
 * B2-RP battle droid
 * B3 ultra battle droid
 * Battle droid assassin
 * Baron battle droid
 * BL-series Battle Legionnaire
 * Pistoeka sabotage droid
 * BX-series droid commando
 * Corporate Alliance Artillery Regular
 * Corporate Alliance Energy Pummel
 * D-60 assault droid
 * D-90 assault droid
 * Light droid starfighter
 * Droid tri-fighter
 * Droideka
 * E-STAP Advanced Droid Starbomber
 * E-STAP Droid Starbomber
 * E-STAP Shielded Droid Starbomber
 * DSD1 dwarf spider droid
 * Grapple droid
 * Ground Armored Tank
 * HKB-3 hunter-killer droid
 * Heavy Corporate Alliance Energy Pummel
 * Heavy dwarf spider droid
 * Heavy Missile Platform
 * Hyena-class bomber
 * IG lancer combat droid
 * IG-100 MagnaGuard
 * IG-226 Hailfire-class droid tank
 * IG-227 Hailfire-class droid tank
 * JK-13 security droid
 * LM-432 crab droid
 * Manta droid subfighter
 * NR-N99 Persuader-class droid enforcer
 * Octuptarra combat tri-droid
 * OG-9 Homing spider droid
 * Ohma-D'un super battle droid
 * Protodeka
 * Scarab-class droid starfighter
 * Spelunker probe droid
 * Turret droid
 * Variable Geometry Self-Propelled Battle Droid, Mark I
 * Variable Geometry Self-Propelled Battle Droid, Mark II

Chirq Council

 * Chirq Mechanized Guardian

IG-88's Droid Army

 * Tao-Ni Security Elite Protector

Zann Consortium

 * Droideka Mark II

Galactic Empire/Imperial Remnant

 * AP-1-C attack droid
 * AP-2 attack droid
 * AP-3 attack droid
 * BT-16 perimeter defense droid
 * IG-97
 * Fromm Tower Droid
 * Dark Trooper Series
 * Hunter-Killer probot
 * N-K Necrosis
 * SD Series Droids
 * Shadow droid
 * TIE/D fighter
 * Viper probe droid
 * XR-85 Tank Droid
 * Z-X3
 * ZQ infantry droid
 * Phase Zero dark trooper

Ssi-ruuk

 * Security Droid
 * Swarm-class battle droid

New Republic/Galactic Federation of Free Alliances

 * Foreign Intruder Defense Organism
 * X-1 Viper
 * YVH 1 Yuuzhan Vong Hunter 1
 * YVH 2 Yuuzhan Vong Hunter 2
 * YVH-M Yuuzhan Vong Hunter mouse droid
 * YVH 5-S Bugcruncher war droid
 * SWAT-droid

Non-canon appearances

 * LEGO Star Wars: The Video Game
 * LEGO Star Wars: The Complete Saga
 * Kowakian Monkey-Lizard
 * Giant spiders are awesome
 * Always count your clones before take-off
 * LEGO Star Wars: The Quest for R2-D2 game
 * LEGO Star Wars: The Quest for R2-D2 film
 * LEGO Star Wars: Revenge of the Brick
 * LEGO Star Wars II: The Original Trilogy
 * LEGO Star Wars: The Padawan Menace
 * Star Wars Battlefront: Renegade Squadron