Haegemonia: The Solon Heritage, developed by Digital Reality, is a stand-alone expansion pack to Legions of Iron, which takes the Haegemonia experience to new heights. This multiplayer-only package offers over 70 new inventions, all new skills and heroes, new spaceships and strategy options, and an all-improved AI. With the ability to colonize, conquer, conduct research, trade, spy, and battle it out, this game offers a wide range of diplomatic options to avoid the extinction of your race.

The Solon Heritage boasts 15 new maps in both solo and multiplayer modes, 10 new ships, including diplomatic ships, race-specific ships, and probes. The game also offers simultaneous invention research, new spy missions, and new special FX created by the unique Walker engine. The game features new hero and mercenary units that are specifically created to diversify the tactical actions. Additionally, the gameplay for inventions and ships has been rebalanced to enhance the overall gaming experience.