With the new release of DCS A10 ( which is awesome and a bit overwhelming at times ;)  ) there are going to be a lot of people new to the level of detail in this flight sim world.  I'll explain the difference as quick as I can.   
Yes I understand this is the helicopter start up procedures in the A10 section (Don't worry about the level of detail guys).  I'm just simply showing the difference between getting off the ground in this game compared to others using a helicopter   
Kamov Ka-50 quick start up procedure.     
[Wall Panel] 
Batteries 1&2 ON   
[Left Panel] 
Rotor Brake OFF 
K-041 ON 
 
[Right Front Panel] 
ABRIS ON   
[Wall Panel] 
Fuel Pumps FWD & AFT ON, external pumps as required if carrying wingtanks. 
Fuel QTY ON 
INTCOM ON 
VHF-2 ON 
Standby S A I ON 
Fire Supressing System OPER   
[Rear Panel] 
Power plant, hydraulics, EKRAN self test systems OPER 
INU HEAT ON 
INU ON   
[Left Front Panel]   
Press MASTER CAUTION push-light twice (2x) to initiate EKRAN self-test   
ENGINE START UP 
------------------   
[Wall Panel] 
APU fuel shutoff valve OPEN     
[Left Panel] 
Start ( Button: Home ) 
After "START VLV" light extinguished and APU running 
Set engine selector to LH (Button: e)   
[Wall Panel] 
Left engine fuel shutoff valve OPEN 
Left engine Electronic Engine Governor (EEG) ON   
[Left Panel]   
Start   
Engine at 2000 RPM or more then 
Left engine fuel cut off OPEN   
After engine is running and START VLV light is extinguished, set engine selector to RH.   
Repeat for right engine.     
AFTER ENGINE STARTUP 
------------------------   
Throttle to Auto (Button: 2x Pageup)     
[Left Panel]   
Shut down APU ( Button: END ) 
   
[Wall Panel]   
When APU completely shut down then: 
APU fuel shutoff valve CLOSED   
Generators ON 
IFF ON 
NAV systems power ON 
VHF-1 ON 
DL ON 
VHF TLK ON 
SA-TLF ON 
Ejecting System Power ( 3 switches ! ) ON  
Weapons control systems ON 
NAV master mode OPER 
NAV Datalink power ON 
Datalink Mastermode set to desired mode 
ID set to your ID ( 4 aircraft in one flight 1, 2, 3, 4) Each pilot with unique number! 
Autopilot channels ON   
[Rear Panel] 
UV-26 ON 
L-140 ON   
[Wall Panel], [Overhead Panel] 
Lights as required   
[Overhead Panel] 
Rotor anti ice as required. 
Engine anti ice/ or Dust protection as required. 
Pitot heat as required.         
Battlefield 2 Helicopter Take Off Procedure 
Hold W 
:smartass:     
I hope you all enjoy my description of the differences between the various methods of taking off.  Just remember that these ARE realistic flight sims with lots of attention to detail.