Usually this means that the game has signature protection, meaning that if you sign the apk with a key other than the one used by the developer, the key will get detected resulting in security trigger (silent crash in your case).
You will need to find the detection logic and bypass it, commonly it is in dex files but it can vary in different games.
Also you can try to use this tool which works in some cases, again which depends on game and its protection logic.
https://github.com/L-JINBIN/ApkSignatureKiller/