Thief

This actually isn’t as daunting as it may first seem when you look at the list of modifiers available. If you like you can stack this with your Master difficulty playthrough as some of the modifiers you will be using are actually beneficial to the more stealth related achievements you are going for in a Master playthrough. More information on that below but first this is the recommended set-up:

• Master Difficulty [x1 modifier]
• No Kills or Knockouts [170]
• No Alerts [145]
• No Focus [50]
• Stealth Takedowns Only [50]
• No Reticle [30]
• Specialty Arrows Only [50]
• No Food or Poppies [100]
• Zero Damage [60]
• Expensive Resources [70]

Total = 725

Here is a break down of exactly why these modifiers were chosen.

Master Difficulty – There is no other choice here as master is the only point modifier high enough to get above 700, which is why it’s a good chance to stack "Something to Prove" and "Hard Times" if you want to cut down on your playthroughs.
No Kills or Knockouts – You are going to want to go for "A Moral Victory" on your master playthrough either way, this combined with the high score value makes it an essential modifier.
No Alerts – Although "Child of the Shadows" is only awarded for completing a single Chapter undetected this is recommended because of it's high point value.
No Focus – You have to play through to the final Chapter without using focus for "Clear Headed" anyway, so applying this takes away the chance of accidentally hitting and using focus.
Stealth Takedowns Only – Again, as we are going for "A Moral Victory" this is essentially a free 50 point modifier.
No Reticle – If you’re not killing anyone the only things you need to be shooting are stationary target’s, some of which will still become highlighted when you have the shot lined up. For anything else it should only take a couple of practice shots to figure out where to aim.
Specialty Arrows Only – Again, no killing, so no need for regular arrows.
No Food or Poppies – If you can’t get hit (see below) you don’t need food and if you’re not using focus you don’t need poppies. Another free 100 point modifier.
Zero Damage – With no kills, no knockouts and no alerts already applied, the only damage you have to worry about is fall damage. Use your judgement and if the jump looks too high find an alternate route down.
Expensive Resources – The only resource you will be buying is specialty arrows and tools, with all your cash going to these two things this really shouldn’t be too much of an issue.

It will still be somewhat challenging, but the good thing about this method is that you don’t have to take the ‘Ironman’ modifier which would disable manual and checkpoint saves. Essentially what this means is that before you enter any kind of difficult situation you can just quickly save your game and if you get spotted or mess up you can reload that save and try again.

This actually isn’t as daunting as it may first seem when you look at the list of modifiers available. If you like you can stack this with your Master difficulty playthrough as some of the modifiers you will be using are actually beneficial to the more stealth related achievements you are going for in a Master playthrough. More information on that below but first this is the recommended set-up:

• Master Difficulty [x1 modifier]
• No Kills or Knockouts [170]
• No Alerts [145]
• No Focus [50]
• Stealth Takedowns Only [50]
• No Reticle [30]
• Specialty Arrows Only [50]
• No Food or Poppies [100]
• Zero Damage [60]
• Expensive Resources [70]

Total = 725

Here is a break down of exactly why these modifiers were chosen.

Master Difficulty – There is no other choice here as master is the only point modifier high enough to get above 700, which is why it’s a good chance to stack "Something to Prove" and "Hard Times" if you want to cut down on your playthroughs.
No Kills or Knockouts – You are going to want to go for "A Moral Victory" on your master playthrough either way, this combined with the high score value makes it an essential modifier.
No Alerts – Although Child of the Shadows is only awarded for completing a single Chapter undetected this is recommended because of it's high point value.
No Focus – You have to play through to the final Chapter without using focus for "Clear Headed" anyway, so applying this takes away the chance of accidentally hitting and using focus.
Stealth Takedowns Only – Again, as we are going for "A Moral Victory" this is essentially a free 50 point modifier.
No Reticle – If you’re not killing anyone the only things you need to be shooting are stationary targets, some of which will still become highlighted when you have the shot lined up. For anything else it should only take a couple of practice shots to figure out where to aim.
Specialty Arrows Only – Again, no killing, so no need for regular arrows.
No Food or Poppies – If you can’t get hit (see below) you don’t need food and if you’re not using focus you don’t need poppies. Another free 100 point modifier.
Zero Damage – With no kills, no knockouts and no alerts already applied, the only damage you have to worry about is fall damage. Use your judgement and if the jump looks too high find an alternate route down.
Expensive Resources – The only resource you will be buying is specialty arrows and tools, with all your cash going to these two things this really shouldn’t be too much of an issue.

It will still be somewhat challenging, but the good thing about this method is that you don’t have to take the ‘Ironman’ modifier which would disable manual and checkpoint saves. Essentially what this means is that before you enter any kind of difficult situation you can just quickly save your game and if you get spotted or mess up you can reload that save and try again.