1 Hope this will help u
1.https://godotengine.org
2.Torq
3.Moai
4.ORX
0 Hai bro ,
These are the following game engines that are free of cost Refer the following Link :
http://www.greatsoftline.com/the-best-open-source-game-engine-in-search-of-perfection/
https://en.wikipedia.org/wiki/List_of_game_engines