Infamy

Infamy is the 'experiance points' that a creep obtains through killing freeps. While the actual infamy per freep kill has not been completely ascertained, it is likely around the following

#Group Members is equal to everyone in your fellowship or raid, regardless where they are in relation to you. Therefore, if raid/fellowship members are not within infamy award distance (which appears to be around 100m), there is a waste of infamy.  As of Mines of Moria, if the # Group Members exceeds 12, the # Group Members is set to 12.  Therefore if you have more than 12, the amount of total infamy gained for everyone in the raid begins to exceed that of a group of 12. 

Rating Bonus is a multipler starting at 1.0 and increasing depending on your rating (appears to be an addition of 0.01 per 200 rating over 1000, e.g. 1400 rating would be a multiplier of 1.02).

% Damage Done is the overall percentage of damage done to the target from your entire group/raid from when it was initially tapped to its death, including all healing. Example: If a 2000 morale freep, after healing, took 2000 damage from one creep and 1000 from another creep before it was defeated, the 2000 damage creep would gain 2/3 of the infamy.

Additionally there is another rating multiplier on top of this.  3% is added if the relics are held by the creeps and 2% is added if the three primary keeps are red (and the relics are held).

Rating

Rating increases for each kill and decreases for each kill. The amount it increases/decreases depends on the rating of the freep killed as well as damage done. For each 100 rating over 1000, the character gains a half a star, to 5 stars at 2000 rating.

% Completed

On the login screen for Monster Play, you will see a % Completed by each slot that you have a creep for. It begins at 0% which represents no passives, no actives, and no traits purchased. 100% means that for that creep you have purchased every passive, active, and every trait, whether you use that trait or not. There is no reward for having 100% completed and is generally a waste of DP as there are many traits that you will never use.

Ranks

Ranks are gained by certain levels of infamy and these equate to a freep's 'level'. All creeps begin at Rank 0 which is equivalent to a swarm level monster verses a freep. Rank 0's have a very low chance of defeating freeps 1-1 and must 'rank up' to gain access to new skills and traits to increase their capability.

Creep/Freep Ranks (Book 2.7 values)

Rank	Creep Title		Infamy Required	Freep Title
0	(none)		0	(none)
1	Tracker		500	Footman
2	Scout		1,250	Esquire
3	Skirmisher		2,750	Guardsman
4	Fighter		5,750	Man-At-Arms
5	Soldier		14,750	Sergent of the Guards
6	Sentry		33,500	Sergent Man-At-Arms
7	Chief Guard		71,000	Master Guardsman
8	Chief Warrior		146,000	Master-At-Arms
9	Taskmaster		258,500	High Warden
10	Lieutenant		408,500	Lieutenant
11	Commander		633,500	Commander
12	Chieftan		1,008,500	Third Marshall
13	High Chieftan		1,608,500	Second Marshall
14	Overlord		2,508,500	First Marshall
15	Tyrant		3,708,500	Captain General

Slayer Deeds

Slayer deeds give titles upon a particular number of killing blows.  For some unknown reason, the killing blows as seen in the war tab are not the same as those in the deed tracker.