GURPSよろず

　Animals built for speed, superspeedsters, robots, and vehicles are likely to have 「高速移動」 in their primary mode of locomotion. Some common explanations:

Physiological: Adaptations such as fins, wings, or a streamlined body often imply such traits as 「水中適応」, 「飛行」 (Small Wings or Winged), and/or No Legs (Aerial or Aquatic), in addition to 「高速移動」. The fastest land creatures aren’t bipeds, and tend to have 追加の脚 --or possibly 追加の腕 or
「攻撃部位」s. Creatures that can only use 「高速移動」 for a short time before they tire should add 「FP消費」 (-5%/レベル).

Technological: Wheels, tracks, jets, rockets, propellers, etc. are likely for robots and vehicles. Such options often suggest additional traits --No Legs (Wheeled) for wheels, Burning Attack for a rocket that doubles as a weapon, and so on. Many of them make the user obvious while in use, which is a 「迷惑」 (-5%).

Superhuman: Those with powers often have more unusual justifications.
These can be invisible (an ordinary- looking man who runs very fast, speedy psychokinetic levitation, etc.) or glaringly obvious (e.g., creating and gliding along a strip of ice). 「FP消費」 and 「迷惑」 are both appropriate.

■代案
「高速移動」 is good for longdistance travel and quickly covering a short distance in a straight line --but if the goal is tactical mobility, extra 基本移動力 is a better choice. See 基本移動力 (p. B17) and その他の環境における移動力 (p. B18).

■追加特別限定
Environmental (p. 110) is allowed, but only if it limits 「高速移動」 to a subset of its usual environment. For instance, 「高速移動」 (Air) couldn’t take Environmental, Air (-5%) --but it could have Environmental, Trees or tall buildings (-20%) in order to benefit Move with Brachiator (p. B41) but not 「飛行」.

All-Out: Moving fast requires your undivided attention! Using your ability is like making an All-Out Attack . . . but without the attack. You have no active defenses and can’t Attack, Concentrate, Ready, etc. Explain what you’re doing: flapping your wings, balancing on two wheels, diverting all your power to project a flame jet or ice path, or whatever else fits. This is worth less than the general All-Out modifier (p. 110), because it doesn’t limit you to half your Move in a forward direction. -20%.

■パワーアップ
Powers that offer 「飛行」 or 「水中適応」 usually incorporate 「高速移動」 (Air) or (Water). The most common explanation for 「高速移動」 (Ground) is a chi- or psi-based body-control power.
Suitable elemental powers can justify almost any form of 「高速移動」. 才能 adds to control rolls, and is cumulative with the Handling Bonus enhancement.