Siege weapons are environmental weapons used in PvP. They are fixed to their build site location, except for siege golems (which can be moved). These weapons can only be used by the team that created them; opponents can attack (and damage) the structures. Important for both offense and defense in World versus World combat, Siege weapons are often the key to winning an otherwise impossible battle.
When placed, a build site is created and requires players to use supply to complete before it is usable. The progress is indicated by a yellow life bar. The build site can take damage during this time, and the more damage it takes, the more supply you will need to reach completion. If the build site is destroyed, the siege weapon and all supply used on it is lost.
Siege weapons can hit more targets than player skills can: either 10 or 50 targets depending on the weapon compared to the limit of five for player skills.
 Types of siege weapons
There are six types of siege weapons that players can build. Siege weapons require the corresponding blueprint to place, which can be bought from a Siege Master, obtained as a reward from the end chests in the WvW jumping puzzles or looted as a rare drop from NPCs.
Each type has a superior version available, which deals 50% extra damage at the cost of requiring slightly more supply to complete. The exception is the Alpha Siege Golem, which upgrades to the Omega Siege Golem, a ranged version with improved skills. Superior blueprints must be created at the mystic forge.
Some siege weapons also have guild versions. The build site of the Guild Siege Suit as well as the guild Catapult may be activated directly through guild upgrade tab. The guild versions of Arrow Carts, Ballistae, Catapults and Trebuchets work like the superior version. The Catapult and Guild Siege Suit, however, need less Supply to construct. There is no Guild version for the Flame Ram.
The available siege weapons are:
|Type||Supply Cost||Range||AoE Limit||Description|
|Flame Ram||40||50||---||360||50||Deals heavy damage to gates.|
|Arrow Cart||30||40||40||2500||50||Deals lethal area damage to infantry.|
|Ballista||30||40||40||3000||10||Deals heavy single target damage to siege equipment and infantry.|
|Catapult||50||60||25||4000||50||Deals heavy area damage to walls and moderate damage to gates.|
|Trebuchet||100||120||120||10,000||50||Deals heavy area damage to walls and moderate damage to gates.|
|Siege Golem||100||150||50||225||10||Deals heavy damage to gates. The only mobile siege weapon.|
 Structural siege weapons
|Type||Supply Cost||Range||AoE Limit||Description|
|Burning Oil||50||600||50||Deals heavy area damage to infantry.|
|Cannon||50||6,000||50||Deals heavy area damage to infantry.|
|Mortar||50||9,400||50||Deals heavy area damage to siege equipment and infantry.|
Once the upgrade is complete, the siege weapons will appear on the structure. If they are destroyed, a build site will spawn after a period of time to allow the weapon to be rebuilt by players.
 Related world abilities
- Siege Bunker
- +1..5% reduced damage from siege weapons
- Siege Might
- +1..5% increased damage with siege weapons
- Build Mastery
- Spend 4..10 supply at a time when building siege
- Supply Master
- Deployed siege sites are invulnerable for a short duration.
- The player who placed the siege weapon is considered its owner. While any ally can use the siege weapon, the owner can take control of the weapon at any time.
- As of the 9th July 2013 update, siege blueprints are no longer account bound, and can be mailed and traded on the trade post. Existing blueprints were converted to tradable ones after acquiring a new blueprint of that type.
- Siege blueprints can be dropped on the ground for other players to pick up by using the weapon swap key when holding the blueprint bundle. Players from other worlds can also pick up the bundle.
 Siege weapons despawning
Player-placed siege weapons despawn if they are not manned for 60 minutes (15 minutes for flame rams). The time remaining is shown by the Siege Decay Timer buff on the weapon; players can reset it by briefly manning the weapon.
Build sites for siege initially have a despawn timer of 2 minutes. Every time a player contributes supply to the build site, the timer is reset to 10 minutes.
Structural siege weapons and build sites do not despawn.
 Siege weapon map limit
There are two basic hard limits to siege placement.
There is a limit to how many siege weapons can be placed within a certain radius of each other. 5 weapons (sites or completed weapons) can be set within any 1000 unit radius. If players try to place a new site somewhere within a radius that already has hit its limit, the placement will fail but the player will retain the weapon bundle in their hands.
There is also a hard limit to how many weapons can be placed on the map. This map limit is explained by Mike Ferguson of ArenaNet as "basically anything that is not a ram counts towards one ‘limit’ for the purpose of this explanation and each team can have up to 100 of these types of weapons out at any time per map. Each team can also have up to 100 rams placed on a map." There is also a cap to the number of golems that can be made, which is an unknown value above 20.
 See also
- ^ https://forum-en.guildwars2.com/forum/pvp/wuvwuv/Siege-Weapons-and-AOE-Limits/first#post1213795
- ^ https://forum-en.guildwars2.com/forum/pvp/wuvwuv/Arenanet-willing-to-share-WvW-details
- ^ https://forum-en.guildwars2.com/forum/wuv/wuv/Golem-Cap-Needed