The designers of Frostpunk 2 have announced that it will have full support for mods via a modding tool called FrostKit. While mods were an oft-requested feature for the first Frostpunk, 11 bit studios had used a proprietary, in-house engine to develop it. Switching to Unreal Engine has allowed them to release a native mod development tool alongside Frostpunk.
"With the FrostKit you will be able to create custom maps, populate them with custom models, and set their new cities - whether ancient, cosmic, or differentiated in thousands of other ways from the original frosty-apocalypse setting - against custom scenarios," said 11 bit studios in the announcement.