Launcher opens. Game doesn't

Basic Info:

Platform: Steam
Issue Type: Crash
Game Mode: =GAME MODE=
Server Type: =SERVER TYPE=
Map: =MAP=
Server Name: None
Mods: None

Bug Description:

The launcher opens. I press start. The launcher closes. Between 5 to 30 seconds later, Steam stops registering the game as open. At no point does the game itself start, not even on the Task Manager

Bug Reproduction:

1.- Click play on Steam.
2.- Click play on Funcom launcher