Game editors/SDKs

[DaWorFizm]

I'm wondering what, if any 'current', 2005 or later, games have editors/SDKs available that can be used to make SP/Co-Op missions. Only ones I'm aware of are Unreal 3 and Operation Flashpoint: Dragon Rising.
What else is out there that you would like to get more SP/Co-Op missions out of?

[Art Blade]

There's an editor for FC2 (MP), but I don't know more either.

[PZ]

Unfortunately for me, my favorite games do not have any kind of mission editor/SDK available.

[DaWorFizm]

Google showed Crysis and Arma 2 - I've never played Arma 2 is it any good? - Can't really tell much from the videos.

[Art Blade]

I've never played Arma 2 is it any good? - Can't really tell much from the videos.

We've got a Game Ratings board where you can read reviews for ArmA2 by JRD and by PZ so far.

:)