Paradox continuously updates their launcher (the infamous "launcher v2"). Every few months, a major update breaks existing unlockers. You are then faced with a choice:
or SmokeAPI, claim to support multiplayer and achievements because they do not modify the core game engine. Common Variants CreamAPI / SmokeAPI
Paradox’s new launcher (the one that logs into your Paradox account) frequently detects modified files. You may find yourself locked out of mods like Imperium Universalis or Europa Expanded because the launcher throws a checksum error.
: Using DLL injectors or modified files can trigger Steam or Paradox account bans, potentially locking you out of your entire library.
Are the dlcs *Really* necessary for the game to be enjoyable. : r/eu4