First, saying support two monitors for games is a very broad topic? What is "games"? "Minecraft on low quality has WAY different requirements than the latest DOOM on ultra settings, so you need to define your gaming goals.
That said, I doubt the 760's would handle 2 1440p monitors very well for most modern games at any decent quality and framerate.
1440p is 3,686,400 pixels, so 2 of them is 7,372,800
Now let's say 4K resolution is 8,294,400 pixels, so 7.3 million/8.2 million is 89%, meaning you are looking to push about 90% the number of pixels 4K requires, so considering even the new 1070 and 1080 can't handle some games maxed at 4K, I would doubt it.
For further reading, google 760 SLI benchmark...