Well if your talking about Steam DRM then your not going to get by that. Why would you want to get pass the .exe anyway?
I know it was already discussed that the OP was trying to protect their own Game.exe file, and not trying to pirate RPG Maker software of a game created with it. That said, Steam DRM is laughably easy to crack in a lot of cases.
Now, in response to the OP - one method you might want to try is going the virtualization route. What this means is that you package the Game.exe file along with any additional files you'd like (for instance: .rxdata/rvdata/rvdata2 files) into a single executable file which unpacks the contents and runs them in memory without ever having to need those packaged files in your project/game folder.
Example Scenario: You take
Game.exe and package the entire
Data folder within it. You may now delete the
Data folder, so that if someone replaces
your Game.exe with another one, it will not run, as it will lack the scripts, actors, mapinfo, etc. databases. Your unique
Game.exe will continue to run fine as it loads them from an embedded section inside the executable into memory when you run it.
So, how do you go about doing this exactly? Well, you'll have to utilize specialized software to aide you in this task. There are
many different routes - but you should be careful which option you go with, as some of them will cause Antivirus software to emit malware warnings as false positives. They don't pack your legitimate software with malware, no. It's just that AV software often uses
heuristics to search for certain signatures or behavior which leads it to believe that some software
could be dangerous. I know that
Molebox sets off all sorts of warnings.
If I were to recommend something personally, it would be the following.
Paid:
VMWare ThinApp
Free:
Enigma Virtual Box
Now, using virtualization software does not act as any sort of DRM. I should make that clear now. It can however be used in conjunction with a chosen DRM method so that in this case, it isn't broken with simply switching in a clean Game.exe file.