The Map Editor is new this update! Create your own maps, and play on tons of new maps from other players.
This update also adds support for 5 and 6-player games, plus Fast-Forward while watching replays.
Season 4 has also begun, with accompanying balance changes and bugfixes. The Automechanic unit has been reworked -- its new name is Chembot. Try out its dangerous new abilities, which give newfound synergy with other Oil/Fire-producing units.