Troubleshooting for game crashes with error "The application encountered an unexpected error"

Some overlay programs can cause Blizzard games to crash.

Troubleshooting steps for if Warcraft II crashes when trying to start the game.

What to do if you are seeing an error after starting the game

Troubleshooting steps for Diablo II (2000) crash errors

Game crashes or doesn't load after pressing "Play" in the Battle.net app or crashes mid-game

Troubleshooting steps for crash problems

Classic game is crashing at startup

Informations about Diablo 1 crashing at launch

Troubleshooting for Battle.net desktop app crashes.