yes i made simple game (1 level) in S2 Engine , Same in UDk ,
unity(dont like unity really , so i stopped after few hours) ,
Unigine (1 level shooter), this engine has beautiful graphics , but expensive
neoaxis( after hours of work i found out that my weapon has to have some diferent shader , so i tried to change it which was imposible, lol.,
Cryengine(has new Fbx importer, which is buggy , unusable for me, and the normal importer is limited to maya and max users(maybe some Softimage users, but u have to download crysis wars trial and use the RC from it , which i dont see very effective
Cafu(haven't made anything in cafu yet
Love(simple platformer) ,
Shiva (super simple ball game, but i have made more clicks than is healthy for my mouse.
XNA tried , not for me as i am not fan of C#
Vision engine (no more trying)
Gamebryo 4 evaluation ( after exttacting all files, i deleted them , no thank you
Torque 3d ( while trying to finish the FPS tutorial , every 15 minutes or so the stupid crazy windows poped up telling me to buy the engine and last 20 seconds, i lost my patience and unistalled that rabbish from my pc.
Panda3D not tried , because of my previous programming knowledges was not good enough.
C4Engine cant say anything because the demo doesnt contain the source code of the shooter ,which i wanted so much
GameMaker tried , but didnt like the interface
Construct simple platformer
i have also tried almost all of teese engines which was a bit usable or available and in development., http://en.wikipedia.org/wiki/List_of_game_engines
After all , i decided that lua is nice simple language , and well Best lua game engine for me was Leadwerks.
this is why i ended up here. i hope this is enough info about your question , and why i am sure what killed plenty of engines.