This is an entertainment game so now you can download sonic forces kickass link with installation video tutorial step by step. I know you have played installment like this before but this one is latest version of this series and there are also many other installment are here so you can also get The fall of lazarus here.
Images
System Requirements
Graphics card 512 MB
Ram 128 MB
Processor pentium 4
Windows 7,8 and XP
Hard Disk Space 1 GB