1) Source engine) Abatron, Counter Strike GO, Insurgency
2) Frostbite 2) Battlefield 3, Army of two the devil’s cartel, C&C generals 2
3) Unreal engine 3) Aliens: colonial marines, Army of two, BioShock
Licenced
Advantages
1) More features than the free version(if one exists)
2) Support is always available.
Disadvantages
1) The creators can ask for a percentage of any revenue that you make using their engine.
2) Can often cost a of of money.
free
Advantages
1) Anyone can use it.
2) Because anyone can use it, people can be more creative and not worry about the legal side of things.
Disadvantages
1) The number of tools is limited.
2) Game engine developers rarely get any credit.
Subscription based
Advantages
1) More tools and features than a free engine.
2) Support is available.
Disadvantages
1) A constant subscription fee has to be paid.
2)
In house game engines
Advantages
1) Engine can be created for a specific game/series e.g. Battlefield franchise.
2) Engine can be exclusive to the creators.
Disadvantages
1) Occasionally not open to people outside the game company behind its creation.
2)
jpinnington 