2003 · ソースブック（プレイを拡張するルール／オプション）
Against Gravity
This Traveller supplement presents more than 30 grav vehicles found throughout the setting, including air/rafts, buses, cargo haulers, tanks, and artillery units. It includes technical guidance on gravity-vehicle technology, advanced vehicle frames, new weapons, and options for designing custom vehicles. A final section profiles corporations involved in the design, manufacture, and sale of grav vehicles.
スキルベース（スキルを購入または獲得）ダイス（主にd6）属性／ステータス制（STR、CON、PERなど）
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。