Engineering: Increased stats for mechanical units. Boost mechanical units?
Alliance with Dwarves (Small People). Give upgrades to dwarf units and gain upgrades from them.
Inventions: Benefit from researches of other races and provide researches for all other allied players/combined effect/unique researches. Units gain bonuses per research.
Gnomenbrau: Beer
Gas: Causes massive damage but also damage to themselves.
Lore: https://wowpedia.fandom.com/wiki/Gnome
Hive: https://www.hiveworkshop.com/repositories/models.530/?search=gnomish The submarine warfare map had some interesting stuff.
Features:
Researches
Buildings:
Sound Sets
Units:
Navy:
Heroes: