A game CD is not a (RW = RE-Write). They are usually always -R.
You can not just erase or format CD/DVD discs.
-R and +R and not erasable disks
-R means you can burn to it only 1 time.
+R means you can only add more content to the disc at a later time. With the exception it is not a Video DVD or Video CD or Windows install media and similar or is copy write protected.
-RW means you can burn to it 1 time and then if the situation meets the criteria, you can erase the disk and re-use it.
+RW means you can add to it many times, by the criteria mentioned above. And then you can also erase or format it and re-use it