The BRU Engine SDK allows people to modify both Tarr Chronicles and Dark Horizon.
Disaster has taken its harsh grip and the universe is slowly dying. Systems cease to exist and there seems to be no way of stopping the threat. But a rumour is slowly spreading through the galaxy of a weapon against this menace - "the Light Core". The space action game Dark Horizon takes place in a breathtaking atmospheric universe with an epic storyline about the fight for survival.
Tarr Chronicles and Dark Horizon version 18.104.22.168 has just been released as well as an SDK for the BRU Engine (Which is used by both games). The main difference between 22.214.171.124 and 126.96.36.199 is the mod support and plugin support.
You can now create mods using the BRU Engine SDK and use them with Tarr Chronicles and Dark Horizon (Note: Mods made for one game may not work with the other). There are currently no known limitations with the mod support except profiles. Profiles are currently global rather than being local to a mod/game(Profiles will become local with the next version). Total Conversions are possible.
You can also create plugins(In C++ or Delphi) for both games (They can either be global or local to a mod) but at this time they only give access to LUA and not direct access to Engine variables.
Both Plugin and Mod Support will be extended over 2012 and beyond. This is the Beginning, not the End.