These challenges leverage our existing event system but are specifically geared to require multi-group, coordinated play to succeed. So gather your guild and see if you’re up to the challenge!
— Official website
Guild Challenges are open world guild missions where members work together to overcome various tasks involving: protecting NPCs or objects, defeating hostile NPCs, destroying objects within a short period of each other, or simply surviving for a set amount of time.
A guild leader triggers the challenge from the influence tab of the guild panel. The guild is assigned one of 6 different guild challenges. The guild has 5 hours to assemble at the starting post and begin the challenge. Each challenge has unique requirements for completion, including a time limit.
The Guild Challenges Unlock upgrade requires Art of War level 6, costing 30000 and 10 days build time, as well as already having acquired the Guild Rushes Unlock upgrade. The Guild Challenges Unlock costs 150 and 50000 and takes 1 week of research. It takes an additional 200 and 24 hours of research to build a Guild Challenge; you can stock up several in advance.
 Member rewards
Members of a guild that successfully finish the rush receive the following rewards:
- 2 pieces of rare or better equipment
- 2 Guild Commendation
- There is also a chance to receive various guild commendation rewards, including an Ascended accessory.
 Guild rewards
Guilds that successfully complete a Challenge will receive 30 Guild Merits.
 Non-guild member rewards
 Reward caps
- Each member can only receive the individual rewards once per week; this resets at midnight UTC Sunday morning.
- The guild can only earn merits from this mission once per week. There is only one tier for this mission.
 Possible challenges
|Challenge||Zone||Area||Closest Waypoint||Time Limit||Notes|
|Blightwater Shatterstrike||Blazeridge Steppes||Blightwater Basin|| Tumok's Waypoint
||20 minutes|| Destroy all crystal nodes before the first regenerates.|
Nodes regenerate 30 seconds after being destroyed.
Nodes can only be damaged by special Charrzookas.
|Branded for Termination||Fields of Ruin||Varim's Run|| Helliot Mine Waypoint
||15 minutes|| Destroy all three targets before the first revives.|
Targets revive 30 seconds after being killed.
|Deep Trouble||Mount Maelstrom||The Mire Sea|| Irwin Isle Waypoint
||10 minutes|| Rescue and escort 10 quaggan from the krait, each to a specific rescue spot.|
Challenge fails if a single quaggan dies.
Quaggan can be rescued and escorted separately.
|Save Our Supplies||Iron Marches||The Granite Front|| Viper's Run Waypoint
||11 minutes 40 seconds|| Protect 20 supply barrels from the Flame Legion for the duration of the challenge.|
At least one barrel must remain at end to succeed. Challenge fails if all 20 are destroyed.
Defensive turrets can be upgraded.
Use mines, mortar shells, and chokepoints to stop enemies.
Strike teams should be sent out to destroy ranged enemies.
|Scratch Sentry Defense||Timberline Falls||Fionnghuala Scratch|| Stromkarl Waypoint
Four waves of enemies
| Protect three skritt sentries against four waves of increasingly challenging enemies.|
Challenge fails if a single sentry dies.
Use tunnels to switch between northern two sentries with a single group.
|Southsun Crab Toss||Southsun Cove||Southsun Shoals|| Kiel's Outpost Waypoint
||5 minutes|| Protect crab carrier from the karka onslaught for the duration of the challenge.|
Challenge fails if carrier is downed, crab falls on the ground, or crab is moved out of red circle.
Carrier is marked but has no endurance regeneration and no skills outside of tossing the crab to another player.
- Guild Challenges were introduced in the Flame and Frost: The Gathering Storm update on February 26th, 2013.