Guild Renown

Overview
Guild Renown (GR) is the method that a Guild uses to gain Guild Levels, as a Guild goes up in levels they unlock various Guild rewards. See Guild Level article for the list of rewards.

How to get Guild Renown
The most basic way to gain renown is to kill NPCs. Once an NPC has been killed (whether by you or another party member, as long as you are inside the quest instance), you will have a percentage chance of gaining renown from that kill. Quest, raid, and mini-bosses, as well as wilderness rares, all generate renown 100% of the time.

Guild Trophies (Renown tokens) can also be found in chests and reward lists:
 * Heroic Deeds - + 50 Guild Renown
 * Tales of Valor - + 150 Guild Renown
 * Impressive Trophy - + 500 Guild Renown
 * Legendary Victory - + 1,000 Guild Renown


 * "We've made a change where mob renown won't rely on collectible bags. Hopefully this change will hit Lamannia on Friday." (Dev MadFloyd on 06-10-2010, 08:30 AM link)
 * "'Odds of renown dropping should be similar to the mechanic used to give XP vs the level of a quest. The higher the player is vs the content the lower the odds, and vice versa.' That has always been the intention." (Dev MadFloyd on 06-10-2010, 01:02 PM link)
 * "We've increased the base chance of finding trophies in chests, and also increased the "epic difficulty" bonus. End rewards should have trophies available very often. (Nearly 100% for Long or Very Long dungeons, in fact.)" (Dev Eladrin on 06-10-2010, 10:38 AM link)
 * "When you run quests at level, you have a 20% chance of finding renown in chests. For every level you're above the quest level, that chance is reduced by 4%. So if you're 3 levels over, you're looking at an 8% chance to find renown." (Dev MadFloyd on 07-22-2010, 01:01 PM link)
 * "the length of the quest affects your chances for renown in the end reward. Unless you're 5 levels over the quest, you should have a minimum of 50% chance to see renown and it goes up from there to 100% for a very long quest." (Dev MadFloyd on 07-22-2010, 01:43 PM link)
 * "it's based on the player with the highest level in the party." (Dev MadFloyd on 07-22-2010, 03:08 PM link)
 * "On Epic you have a 7% additional chance for drops from chests and monsters compared to Normal." (Dev MadFloyd on 07-22-2010, 03:09 PM link)
 * "the level of the quest iplays [sic] a role in the average value of the renown." (Dev MadFloyd on 07-22-2010, 03:30 PM link)
 * "Guild renown drops from chests and end rewards have been increased. End rewards now have a 50% chance to drop." (Update 5.1 Patch 1 release notes on 07-26-2010, 11:59 AM link)


 * Best places to earn Guild Renown thread, by Crazyfruit

Guild Renown boost
Small guilds (by number of unique accounts, not characters) get a "small guild bonus" to renown received by any of their members. This bonus is earned when there are 25 accounts or fewer in the guild. The bonus is supposed to ramp up the fewer the number of accounts in your guild (guilds of 26 accounts or more get no bonus, 25-account guilds get a small bonus, 24-account guilds get a slightly larger bonus, etc.).


 * Update 7 added a Medium Guild Renown boost for guilds of 26-50 accounts. This needs to be added here. Not sure if the small guild boost graph also changed.

Source Problem with Small Guild Renown Bonus Formula

Example: If you had 6 unique accounts in your guild, your small guild bonus would be 300% of the base renown gained. A Heroic Deeds (50 renown) would be 50 + (50 x 300% = 150) = 200 total.

Guild Renown required per Guild Level
Source - DDO daily

How Guilds Lose Renown
Renown starts to decay at level 26. Decay is applied once every 24 hours. The exact time this decay is applied can vary. The current theory is that the decay happens around 24 hours after your guild hit 26, but this time may change when servers go down for maintenance. It is no longer necessary to try and track when the decay is applied in order to determine amount of decay. You can simply use the formula provided below.

Guild renown decay formula
The formula for renown decay is a level-based multiplier times an account-based multiplier (LevelMultiplier * AccountMultiplier). The account-based multiplier is the number of accounts + 10. The level-based multiplier can be looked up in the list below.

Example:
Guild level:26, Member Count: 6 Renown lost = (LevelMultiplier * AccountMultiplier) Renown lost = (2.197 * (6 + 10)) Renown lost = 35.152 [NOTE: rounding may apply]

The level-based multiplier, shown in the table above, is determined by the minimum renown needed to be at that level, not your current renown, which is 50 * Level^3. Take every 5 levels starting at the onset of renown decay to be a tier (so level 26-30 = tier 1, level 31-35 = tier 2, etc.). Multiply the renown by the tier that the level is in. Then, multiply the product by the following:

Now divide by 1,000,000. The result will be the level-based multiplier for renown decay.

Example:
Guild level:26 minimum renown = 50*(Glevel)^3 minimum renown = 878,800

Level-based mult = [(Minimum renown) * (Tier multiplier)]/1,000,000 Level-based mult = [878,800 * 2.5]/1,000,000 Level-based mult = [2,197,000]/1,000,000 Level-based mult = 2.197

Guild renown loss from leaving characters
Guilds may also lose renown when a character leaves the guild. Note that this renown is just gone, they cannot add it onto another guild. So, if a player needs to re-roll a character, they should:
 * If a character leaves on amicable terms, 10% of the renown that character gained while a member of the guild is lost.
 * If a character leaves on bad terms, 25% of the renown that character gained while a member of the guild is lost.
 * If a character is expelled by an officer of the guild, 25% of the renown that character gained while a member of the guild is lost.
 * If a character is deleted from the Character Select screen while a member of a guild, no renown is lost.
 * If all characters from an account leave the guild, the Modified Guild Size is increased by 1 for the next 2 weeks. This is the "Recent Departures" portion of the Modified Guild Size. This increases the guild's daily renown decay for 14 days.
 * 1) Have at least one other character in the guild, so they won't add to the Recent Departures. If they have no other character in guild currently, bring one in as a placeholder.
 * 2) Delete the character from the Character Select screen without removing it from the guild.
 * 3) Recreate the character and get it re-invited to the guild.
 * 4) Remove the placeholder character from the guild if desired. If the placeholder didn't earn any renown while in the guild, none will be lost when it leaves. If it did earn some renown, leave on amicable terms to minimize the loss.