XCOM 2 for Steam is a special case, 2K said, as the launcher included Mod support functionality. Of note, these changes will let you enable mods on the Steam Deck.

Games like XCOM 2 will still retain their original mod launcher for players who enjoy community content.

XCOM 2 was one of very few games to attach some functionality to the 2K Launcher—it handled mod support—so launching that game from Steam will now present you with options to launch either the ...