B206, engine fails and you sure know about it real soon - need to apply rapid appropriate skill;
B212, engine fails in the cruise turns you into a B205 - no special skill required;
B412, engine fails at CDP and good chance you'll fly away (412EP that is) - a bit of skill is very helpful;
B214ST, engine fails anytime and you might notice, or might not - only abinitio pilot skill required;
S76A, engine fails and you know about it - need to apply prompt appropriate skill;
S76C above 23 deg C, same as for the A model;
S76C+, same as for 412 but love that 30 sec OEI power - a bit of skill is helpful;
S76C++, can't wait to give it a try!