Fire giant

Fire giants are the strongest giants in RuneScape and they are well known for their combat and Slayer experience and gold charm drop rate. Like all giants, they have high life points but low defence for their combat level. They attack with melee and ranged, and can deal as much as 670 life points of damage per hit. They are particularly weak to slashing weapons so a Chaotic longsword or abyssal whip can prove very effective in defeating them. They seem to have a good chance of dropping items from the rare item table, making camping them a good moneymaking method.

They only attack with ranged when the player either initiates combat or attempts to attack from outside the giants melee range. Because their melee attack seems to be much weaker than their ranged attack, it is recommended to let the Fire Giant attack you first, as then they will only use their melee attack. If wearing Rune armor or better, you will barely take any damage at all.

Waterfall Dungeon
The Waterfall Dungeon requires the player to complete a large portion of the Waterfall Quest to access the area. After the quest, Glarial's amulet and a rope will always be needed to enter the dungeon, reducing the player's inventory space. The dungeon contains two rooms with fire giant spawns, but it is fairly cramped.

Waterfall Dungeon resource dungeon
The Baxtorian Falls resource dungeon, located within the Waterfall Dungeon, contains 13 fire giants and requires level 35 Dungeoneering to enter. As it is inside the Waterfall Dungeon, the player must have done the appropriate parts of Waterfall Quest, as well as have Glarial's amulet, and a rope. Because of the higher requirements, this dungeon tends to be less crowded than the outer area of the Waterfall Dungeon. Unlike the Chaos Tunnels, a cannon can be set up in this area, allowing a very fast kill rate. The resource dungeon is more spacious than the outer Waterfall Dungeon.

Chaos Tunnels
Fire giants can be found in three rooms inside the Chaos Tunnels. They are more convenient to get to than the giants in the waterfall.

While the tunnels do not have the effect of being in the Wilderness, all but the most remote entrance to the tunnels are located within the Wilderness, so players must choose to either risk player killers or take a very long walk. The non-wilderness route, safe from player killers, is located under the statue just south of the sawmill in Varrock, leading through the Dagon'hai area and most of the chaos tunnels. Completion of What Lies Below is required to use this route and completion of the Hunt for Surok subquest is useful, allowing all portals in the tunnels to be usable. The various recommended rooms located in the tunnels are as follows:
 * The first room of fire giants is just west of the Giant rock crabs room. The rock crabs are accessible directly via the rift entrance northeast of Edgeville marked #2 on the Chaos Tunnels map. Using the west portal in this room will take the player to the fire giants area.
 * The second room containing fire giants is just south of the room that contains Moss giants to the north-west rift entrance marked #4 on the Chaos Tunnels map. These fire giants are actually fairly remote, requiring a decent walk from any entrance which easily results in players getting lost. The shortest routes to this room actually go through the other rooms with other fire giants anyway, so this room is usually only used as an overflow room. Bank runs from here are cumbersome, so players slaying here will probably want to consider only picking up abbreviated drops.
 * The third room of fire giants is east from the Dust devils on rift entrance marked #1 on the Chaos Tunnels map. These fire giants are also remote and barely used at times. Protect from melee or Deflect melee is highly advised as there are several Mummies that can hit very high on the way. The fire giants here are much more cramped then the other two rooms meaning it is possible to train here quickly without moving around. It is highly recommended to use Dust devil protection in case you accidentally attack one on the way. Otherwise use entrance marked #4, run south past the fire giants to the Zamorak group to the Giant rock crabs and use the southernmost portal in the crab room to end up in the fire giants. Bank runs are cumbersome unless you are on Ancient Magicks.

Smoke Dungeon
The Smoke Dungeon from Desert Treasure quest has a number of fire giants, and is usually empty of players. There are 4 fire giants located in the large central chamber, at the corners of the room. This Dungeon requires the player to wear either a face mask, Gas mask, Masked earmuffs, slayer helm, or full slayer helm. Without a mask item the player's health will drop very quickly due to smoke inhalation; an environmental hazard present within the dungeon which rapidly hits for around 200 Lp. However, you CANNOT DIE from the smoke. The giants are not confined, so players will need to do a little running around.

Brimhaven Dungeon
There are a number of fire giants in the Brimhaven Dungeon, which requires a toll of 875gp per trip (exempt from toll if a player has ever acquired the Karamja Gloves 3) and a hatchet (toolbelt WILL work) to access, as some passages are blocked by roots. These giants are now a good option for both training and slayer, as the wild dogs are unaggressive to players who are over combat level 101. Using the Brimhaven Dungeon can be a convenient method of banking the drops of the fire giants: Teleport to Ardougne or Ardougne cape, House Teleport (Chipped) or boat from the ardougne docks, repeat. The easiest way to get there, would be using the Karamja lodestone, which is just east of the dungeon.

Deep Wilderness Dungeon
The Deep Wilderness Dungeon, slightly southeast of the Wilderness agility course, contains 6 fire giants at the very end of the dungeon. It is very rare to find others training here, as fear of player-killers wards away most people. This dungeon is excellent if other locations are already filled as its close distance from a bank and overall isolated location. Remember that this location is extremely dangerous as you are still in high-level Wilderness and can be killed by players at any time.

100% drop

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Weapons, Armour and Ammunition

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Runes

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Herbs

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Other

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Trivia

 * Even though the TokKul-Zo is supposed to work against "TzHaar, Fire and Obsidian creatures", it has no effect on Fire Giants; as no charges are used. This may be due to the fact that the TokKul-Zo is designed for use against Lava creatures.
 * These monsters create a very quiet rustling or hissing sound all the time, which gets louder as you get closer to the giant. According to the Audio Options interface, this is considered an ambient sound. It probably represents their internal fire, visible from above a giant's head.
 * These monsters were popular for training ranged prior to the Evolution of Combat, but have since lost popularity due to their new ability to retaliate with ranged attacks of their own.
 * Before the graphical updates, the Fire Giants' weapon was often thought to be a Dragon 2h sword. This was before Dragon 2hs were released in the game, so this similarity was noted by many players. One player even asked in the third Postbag from the Hedge:

The reply was: