These are the customisation options for the upcoming Thief reboot..
http://community.eidosmontreal.com/blogs/Stealing-Time-Episode-4
In a nutshell... every part of the HUD can be toggled on/off, and other options include....
* Chapter Save Only: manual saves and checkpoint auto-saves are disabled.
* No Focus: the use of Focus is completely disabled and no Focus Points are earned.
* Stealth Takedowns Only: you cannot perform combat Takedowns and Takedowns from above.
* No Reticle: no aiming reticle is displayed when drawing the bow.
* Specialty Arrows Only: only Blunt, Water, Fire and Rope Arrows are available.
* No Resources: food (health) and poppy flowers (Focus) are not consumable.
* It Hurts Not: if you take any damage, the mission is failed.
* Expensive Tools: the cost of arrows, tools, food and poppies is greatly increased.
* Slowed Movement: running and walking speeds are reduced.
* Iron Man: if you die or fail a mission, you lose your game and must restart from the beginning.
* No Upgrades: non-critical upgrades are disabled.
* No Kills or Knockouts: if a human or animal is killed or stunned, the mission is failed.
* No Alerts: if a human or animal detects you, the mission is failed.
So you can really tailor the game to suit your tastes... I hope Beth give us such intricate toggle options in their next release. Options like this are what make a game that extra special.