If you have a windows, Direct 3D will not work on it, so ensure that you are playing in OpenGL by going to options>video settings>game>OpenGL then restart your game. To prevent this problem of crashing, you can go to a less populated map, if you're still experiencing this in another map. Then that's still not unusual.. try adjusting your game settings, shut off your water reflection and view distance, including nametags.
EDIT: I notice there's another thread you posted on. Perhaps this is already solved?
Right click the FeralHeart icon on your desktop and select "Run ans Administrator" If that does not work, try these options:
Games not opening up? Try this easy way! Windows 7-8/Vista/XP
Try this for both FeralHeart and your other
games that will not open, or simply crash at the start:
(http://i41BannedImageSite/2j61u7q.png)
Right click the game icon on your desktop and select "Properties"
then click on "Compatibility and follow the instructions in the image above.
When you reach the dropdown box, select the format you are using~
Finally, click "Apply" then "OK".
Also, For FeralHeart (If the game won't open) open up your main FeralHeart Folder
and open up a config file named "ogre" in notepad (or any other word document) and replace it with this:
Render System=Direct3D9 Rendering Subsystem
[Direct3D9 Rendering Subsystem]
Allow NVPerfHUD=No
FSAA=0
Floating-point mode=Fastest
Full Screen=No
Rendering Device=Monitor-1-AMD Radeon HD 7700 Series
Resource Creation Policy=Create on all devices
VSync=No
VSync Interval=1
Video Mode=1280 x 800 @ 32-bit colour
sRGB Gamma Conversion=No
[OpenGL Rendering Subsystem]
Colour Depth=32
Display Frequency=N/A
FSAA=0
Full Screen=No
RTT Preferred Mode=FBO
VSync=No
VSync Interval=1
Video Mode=800 x 600
sRGB Gamma Conversion=No
Then save and relaunch the game! (If nothing takes affect, try restarting
your computer too.) However, if FeralHeart DOES open and it leads onto the title screen
then go to Options\Video\Rendering Subsystem\Direct3D9 then relaunch the game~
And how do I shut off my water reflection and veiw distance? etc.
(http://i.imgur.com/WQjFrJ9.png)
Go to options and view Interface or Video to turn off/lower the reflections, distance, etc.