The S76 C series do have a "vertical take-off profile" named "CAT A Vertical Operations from Elevated Heliports" in the supplements list of the RFM.
I don't have the informations with me now, but I know it involves some modifications including a door window on pilot's doors and a "detend" on the collective, a precision airspeed indicator and an accurate operational procedure.
Performances are also affected ( penalty on the MTOW )
This "CAT A" garanties either a continued take off after a decision point, or an aborted landing back on the dedicated surface (same principle for landing)
This procedure have been set up in order to cope with an engine failure on elevated heliport take-off and landing over so called "hostile areas" (where an emergency landing cannot be done without life treatening) ....