|By flickers, do you mean that it is constant or random? |
Are there any connections you can think of between the games, such as where you purchased them from? If so, it could be that some third party background process is running and causing this (such as the steam client, it loads whenever you launch a steam game).
I doubt it has anything to do with Windows 8.1 (that is the OS you're using, right?), it is most likely caused by some background program. It is a possibility that it is due to malware (possibly you got it while downloading the games) so I would suggest downloading this and running a scan:
Although why a virus would only make a small symbol appear only while playing games is beyond me. Does this symbol appear while in any programs?
message edited by NT56erbx