The primary purpose of a trojan like Wacatac is not to destroy your files but to operate stealthily in the background. It's focused on stealing data (like passwords), giving attackers remote access, or downloading other malicious software. Damaging or corrupting other programs would make its presence more obvious, which is something the attackers want to avoid.
It is very unlikely that the removal of this malware will corrupt your games. Microsoft Defender, is very precise. When it removes a threat, it targets only the specific malicious files it has identified. Your legitimate games have no reason to be using that specific malicious .dll file in that unusual location. Therefore, removing it won't break them.
Most game platforms have a built-in feature for verify the integrity of your game files. This process scans the game's installation folder, compares the files to the official versions on their servers, and replaces any that are missing or different.
On Steam, Right-click the game in your library, then Properties, then Installed Files, Verify integrity of game files.
On the Epic Games Store, go to your library, click the three dots on the game tile, Manage, Verify.
Other Platforms (EA App, GOG Galaxy, etc.), They have similar "Repair" or "Verify" functions.
