
“It was a little bit of a shock that anyone actually made mods for Enemy Unknown,” says Jake Solomon, creative director on XCOM: Enemy Unknown and XCOM 2. What this told the team at 2K Firaxis was that there was a community out there that very much wanted to tinker with what they’d made.

It lengthens Enemy Unknown significantly, as well as increases the difficulty and complexity, and adds a few other notable changes to the mechanics. Perhaps the most popular of all of them, Long War, has had nearly a million downloads on the modding website Nexusmods.
