Please follow these guidelines/instructions :What To Do When McAfee Detects Legitimate Software As An Infection - How to Submit To McAfee Labs & Appeal
You will get an immediate reply so post the analysis ID number here and post back if no fix in 4 days so I can get a tech to fix it.
Artemis protection is detecting any of changed script in launchers as infectious. Are you sure that you are using the official one? Sounds like some patched version of game