Some points in the Designer's Notes chapter of the v2.2 rulebook:
- New skills and some renamed skills from the previous version to match the "Traveller: The New Era skill list" (that uses the same set of rules).
- In the character generation, the number of skills points that a character can spend decrease with each term.
- D20 based task resolution system
- Minor adjustements in the combat system, that becomes the same that in "Traveller:TNE". Changes in auto-fire system, a new quick kill rule, increased damage capacity in the NPC's and animals, Fire Control and target size rules, Reactive Armor, Amphibious vehicle water movement.
- Some new vehicles
For those who, like me, use old v2 or v1 modules and adventures from Twilight:2000 or Dark Conspiracy with the v2.2 system, the only two really need adjustments are: Increase the hit points of the NPC's and take into account that an Average check in the old systems are a Difficult check in the v2.2.