Diese Tech-Demo (Christmas Edition - erweiterte Version der ersten Tech-Demo) enthält eine Kampagne mit fünf Missionen sowie neue Waffen, Sounds und eine verbesserte Gameplay-Balance. Eine Anleitung zum Spiel findet ihr hier. So we took the last techdemo, did not edit the source code at all, but applied a few other changes: In the UFO:AI Demo Christmas Edition, which is a standalone game (you don't need the original demo to play it) we feature a campaign with no less than five new maps - including an awesome ufo crashsite - laser weapons, a new soundtrack, several brand-new sounds effects, fires, and improved weapon balance.
