Navigate to your AoE3 DE installation folder. (Steam default: C:\Program Files (x86)\Steam\steamapps\common\AoE3DE ) Copy the original steam_api64.dll to a backup folder on your desktop. You will need this to revert to official multiplayer.
: It replaces or supplements the game's original .dll files to trick the software into thinking it is connected to official servers while it is actually communicating directly with other computers on the same local network.
: The emulator does not know which game it is simulating.
Installing the De La Fix by MrGoldberg is a relatively straightforward process. Here's a step-by-step guide:
This comprehensive guide will help you resolve the "MrGoldberg Extra Quality" LAN issues to ensure seamless offline multiplayer gameplay. Understanding the MrGoldberg LAN Issue
: It emulates the official matchmaking servers, converting the "fake" LAN mode into a real LAN mode that works without an internet connection.
Copy the Goldberg version of steam_api64.dll into that same folder.