Sharpshooter
Rear Admiral
I've been looking for something like this for a long time and never managed to find it, so I made it myself.
So, for those interested, here's what happens to your reputation points for each faction every time you destroy a ship. You start with 0 reputation points with the Merchants, Hunters, Confeds, and Militia; -50 points with the Kilrathi and Pirates, and -128 with the Retros. Factions are hostile below -25, friendly above 25, and neutral between -25 and 25.
Your reputation, apart from being what decides whether factions are hostile and friendly, also affects how many friendly comm messages you have to send to an enemy before it becomes friendly, or how many hostile messages you have to send to a friendly ship before it attacks you. Hostile Retros cannot be pacified with comm messages. Friendly Retros cannot be made hostile with comm messages, either. Also, many ships that are spawned by accepting missions will always be hostile. There are ships that will always start out friendly when accepting some missions, too.
Finally, note that unlike the killboard, the reputation system is ship-based, not pilot-based. For example, Menesch is a pirate, so killing him gives you +1 to your pirate kills on the killboard. But as far as reputation is concerned, the ship he's using is a Hunter ship, and your reputation will be set accordingly.
Tarsus
Merchant : -5
Hunter : -5
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +5
Retro : No change
Galaxy
Merchant : -5
Hunter : -10
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +10
Retro : No change
Drayman
Merchant : -10
Hunter : -15
Confed : -10
Kilrathi : No change
Militia : -10
Pirate : +15
Retro : No change
Orion
Merchant : No change
Hunter : -10
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +10
Retro : No change
Demon
Merchant : No change
Hunter : -15
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +15
Retro : No change
Centurion
Merchant : No change
Hunter : -20
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +20
Retro : No change
Stiletto
Merchant : No change
Hunter : -5
Confed : -5
Kilrathi : +5
Militia : -5
Pirate : +5
Retro : No change
Broadsword
Merchant : No change
Hunter : -5
Confed : -10
Kilrathi : +10
Militia :-5
Pirate : +10
Retro : No change
Paradigm
Merchant : -5
Hunter : -20
Confed : -25
Kilrathi : +25
Militia : -15
Pirate : +25
Retro : No change
Dralthi
Merchant : No change
Hunter : +1
Confed : +1
Kilrathi : -1
Militia : +1
Pirate : No change
Retro : No change
Gothri
Merchant : No change
Hunter : +1
Confed : +1
Kilrathi : -5
Militia : +1
Pirate : No change
Retro : No change
Kamekh
Merchant : +1
Hunter : +1
Confed : +5
Kilrathi : -15
Militia : +5
Pirate : No change
Retro : No change
Brown-winged Talon
Merchant : No change
Hunter : -5
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +5
Retro : No change
Gladius
Merchant : No change
Hunter : -5
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +5
Retro : No change
Dark Talon
Merchant : +1
Hunter : +1
Confed : +1
Kilrathi : No change
Militia : +1
Pirate : -5
Retro : No change
White Talon
Merchant : +1
Hunter : +1
Confed : +1
Kilrathi : No change
Militia : +1
Pirate : +1
Retro : -5
Salthi
Merchant : +1
Hunter : +1
Confed : +1
Kilrathi : No change
Militia : +1
Pirate : +1
Retro : -5
Elite Salthi
Merchant : +1
Hunter : +1
Confed : +1
Kilrathi : No change
Militia : +1
Pirate : +1
Retro : -5
Steltek Scout
Merchant : No change
Hunter : No change
Confed : No change
Kilrathi : No change
Militia : No change
Pirate : No change
Retro : No change
Steltek Drone
Merchant : +25
Hunter : +25
Confed : +25
Kilrathi : +25
Militia : +25
Pirate : +25
Retro : No change
Strangely enough, the Kilrathi and Pirates are much more forgiving when you destroy their ships than the "good guys". In fact, if you were to repeatedly destroy the same number of Stilettos and Dralthis, your reputation with the Confeds would keep decreasing whereas your reputation with the Kilrathi would keep going up.
As you can see, Bounty Hunters are somewhat tough to keep on your side. Once you've lost their trust, regaining it is hard since no ship will ever give you more than a single reputation point with them (aside from the Steltek Drone). I personally like to lure some of the Palan blockade ships towards the 4 Gothri that sometimes spawn at Basra. Then I let them deal the final blow on the Demons and Centurions, since your reputation only gets affected if you personally destroy a ship. Alternatively, you can use the asteroid field in the Palan system. Ships destroyed by asteroids do not affect your reputation. If Pirates happen to spawn in the asteroid field, they can help you as well.
In order to get the Retros on your side, you must destroy 6529 Retro ships (White Talons/Salthi/Elite Salthi). As far as I know, there is no other non-cheating way to do it. Also, these are Retro ships we're talking about, not Retro pilots, so destroying Militia Talons flown by Retros, such as the ones that ambush you at Oxford during one of Masterson's missions in Righteous Fire, will not help you. Sadly, the comm messages for friendly Retros aren't voiced (which is IMO a pity, because I'd have loved to hear them shout "Free all Pot prisoners"). They're not exceptionally talkative either and won't greet you very often. Expect them to ignore most of your comm messages. When you're allied with the Retros, some of the Retros you'd normally fight during plot missions will sometimes let you autopilot away from them, although they will still shoot at you if you stick around for too long. This is very helpful during the RF mission where you have to patrol Death, Pestilence, and War, as every single Retro in that mission will let you autopilot. Despite this, the colossal amount of effort involved in allying with them means that it's still not worth it overall, if you ask me.
So, for those interested, here's what happens to your reputation points for each faction every time you destroy a ship. You start with 0 reputation points with the Merchants, Hunters, Confeds, and Militia; -50 points with the Kilrathi and Pirates, and -128 with the Retros. Factions are hostile below -25, friendly above 25, and neutral between -25 and 25.
Your reputation, apart from being what decides whether factions are hostile and friendly, also affects how many friendly comm messages you have to send to an enemy before it becomes friendly, or how many hostile messages you have to send to a friendly ship before it attacks you. Hostile Retros cannot be pacified with comm messages. Friendly Retros cannot be made hostile with comm messages, either. Also, many ships that are spawned by accepting missions will always be hostile. There are ships that will always start out friendly when accepting some missions, too.
Finally, note that unlike the killboard, the reputation system is ship-based, not pilot-based. For example, Menesch is a pirate, so killing him gives you +1 to your pirate kills on the killboard. But as far as reputation is concerned, the ship he's using is a Hunter ship, and your reputation will be set accordingly.
Tarsus
Merchant : -5
Hunter : -5
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +5
Retro : No change
Galaxy
Merchant : -5
Hunter : -10
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +10
Retro : No change
Drayman
Merchant : -10
Hunter : -15
Confed : -10
Kilrathi : No change
Militia : -10
Pirate : +15
Retro : No change
Orion
Merchant : No change
Hunter : -10
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +10
Retro : No change
Demon
Merchant : No change
Hunter : -15
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +15
Retro : No change
Centurion
Merchant : No change
Hunter : -20
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +20
Retro : No change
Stiletto
Merchant : No change
Hunter : -5
Confed : -5
Kilrathi : +5
Militia : -5
Pirate : +5
Retro : No change
Broadsword
Merchant : No change
Hunter : -5
Confed : -10
Kilrathi : +10
Militia :-5
Pirate : +10
Retro : No change
Paradigm
Merchant : -5
Hunter : -20
Confed : -25
Kilrathi : +25
Militia : -15
Pirate : +25
Retro : No change
Dralthi
Merchant : No change
Hunter : +1
Confed : +1
Kilrathi : -1
Militia : +1
Pirate : No change
Retro : No change
Gothri
Merchant : No change
Hunter : +1
Confed : +1
Kilrathi : -5
Militia : +1
Pirate : No change
Retro : No change
Kamekh
Merchant : +1
Hunter : +1
Confed : +5
Kilrathi : -15
Militia : +5
Pirate : No change
Retro : No change
Brown-winged Talon
Merchant : No change
Hunter : -5
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +5
Retro : No change
Gladius
Merchant : No change
Hunter : -5
Confed : -5
Kilrathi : No change
Militia : -5
Pirate : +5
Retro : No change
Dark Talon
Merchant : +1
Hunter : +1
Confed : +1
Kilrathi : No change
Militia : +1
Pirate : -5
Retro : No change
White Talon
Merchant : +1
Hunter : +1
Confed : +1
Kilrathi : No change
Militia : +1
Pirate : +1
Retro : -5
Salthi
Merchant : +1
Hunter : +1
Confed : +1
Kilrathi : No change
Militia : +1
Pirate : +1
Retro : -5
Elite Salthi
Merchant : +1
Hunter : +1
Confed : +1
Kilrathi : No change
Militia : +1
Pirate : +1
Retro : -5
Steltek Scout
Merchant : No change
Hunter : No change
Confed : No change
Kilrathi : No change
Militia : No change
Pirate : No change
Retro : No change
Steltek Drone
Merchant : +25
Hunter : +25
Confed : +25
Kilrathi : +25
Militia : +25
Pirate : +25
Retro : No change
Strangely enough, the Kilrathi and Pirates are much more forgiving when you destroy their ships than the "good guys". In fact, if you were to repeatedly destroy the same number of Stilettos and Dralthis, your reputation with the Confeds would keep decreasing whereas your reputation with the Kilrathi would keep going up.
As you can see, Bounty Hunters are somewhat tough to keep on your side. Once you've lost their trust, regaining it is hard since no ship will ever give you more than a single reputation point with them (aside from the Steltek Drone). I personally like to lure some of the Palan blockade ships towards the 4 Gothri that sometimes spawn at Basra. Then I let them deal the final blow on the Demons and Centurions, since your reputation only gets affected if you personally destroy a ship. Alternatively, you can use the asteroid field in the Palan system. Ships destroyed by asteroids do not affect your reputation. If Pirates happen to spawn in the asteroid field, they can help you as well.
In order to get the Retros on your side, you must destroy 6529 Retro ships (White Talons/Salthi/Elite Salthi). As far as I know, there is no other non-cheating way to do it. Also, these are Retro ships we're talking about, not Retro pilots, so destroying Militia Talons flown by Retros, such as the ones that ambush you at Oxford during one of Masterson's missions in Righteous Fire, will not help you. Sadly, the comm messages for friendly Retros aren't voiced (which is IMO a pity, because I'd have loved to hear them shout "Free all Pot prisoners"). They're not exceptionally talkative either and won't greet you very often. Expect them to ignore most of your comm messages. When you're allied with the Retros, some of the Retros you'd normally fight during plot missions will sometimes let you autopilot away from them, although they will still shoot at you if you stick around for too long. This is very helpful during the RF mission where you have to patrol Death, Pestilence, and War, as every single Retro in that mission will let you autopilot. Despite this, the colossal amount of effort involved in allying with them means that it's still not worth it overall, if you ask me.