The latest expansion aims to expand the gameplay of the Horde mode, as you can easily guess.
Rise of the Horde expansion for Gears of War 4 will release alongside the latest update on June 6th. 15 new skills will be added in total (three for each class), including Level 6 ones, with some interesting powers like Cloak allowing snipers to become invisible.
Killing bosses on Waves 30, 40 and 50 will grant a random reward with different Horde skills. Season Pass holders can expect more of the bonuses, with Gear Pack giving instant access to five of those skills, and a bonus free Horde Expert Pack will wait for everyone of them.
Two new difficulty levels will be added, with Inconceivable being even crazier than Insanity as your health lowers. Ironman Mode, on the other hand, is something you surely expect – if you die you have to start from scratch, both in the campaign and in Horde mode (“no COG tags will be dropped when you die”).
500G worth of achievements will be added, requiring you to complete the story with Ironman turned on and your friend joining you in co-op. The Avalanche map from Gears of War 2 and Rust Lung from Gears of War 3 are also remade for Gears of War 4 unique looks and gameplay features.