Entrance Randomizer
Entrance Randomizer will not have any effect until you get to Hell's Kitchen. Lots of locks doors and elevators have buttons added on their backside to allow backwards travel, these will not be listed here. Also some helicopters will not fly away in order to allow you to backtrack more.
If you need help, you can click the spoiler button 
Added a rebreather
Disabled the falling platforms, and also added a rebreather
Added a rebreather
Tong's base is always in the vanilla location.
There is a boat that will allow you to climb up into the pipe that is normally the exit from the UC.
There is a datacube somewhere with the code for the elevator in Wanchai Market.
There is a datacube somewhere with the code for the keypad in the garage.
The door to the back side of the tunnels now has a key somewhere on the map, in a randomized location.
When coming up from the UC side first, you'll need these extra keys.
List some additions that will help you beat the game, like added backtracking buttons or datacubes...
DXRBacktracking additions are always enabled even when entrance rando is disabled https://github.com/Die4Ever/deus-ex-randomizer/blob/master/DXRModules/DeusEx/Classes/DXRBacktracking.uc
DXREntranceRando ApplyFixes() is only when entrance rando is enabled https://github.com/Die4Ever/deus-ex-randomizer/blob/master/DXRModules/DeusEx/Classes/DXREntranceRando.uc#L729-L748
some stuff in DXRFixup might be worth mentioning too, like the add_datacubes list https://github.com/Die4Ever/deus-ex-randomizer/blob/master/DXRModules/DeusEx/Classes/DXRFixup.uc#L78-L84
Also some exceptions, like Tong's Base is always at the vanilla teleporter
And maybe also list some vanilla things that are not well-known but helpful for entrance rando