• Flat roofs

  • Count as normal ground (easy to move across).

  • In snowy or debris‑heavy climates, a GM can treat overloaded flats as uneven ground or even collapsing hazards.

• Angled roofs

  • Generally treated as uneven ground.

  • If especially steep, treat the surface as an incline, often requiring checks (Acrobatics/Balance) to move safely and making forced movement more dangerous.

  • The peak/ridge of an angled roof is a narrow surface, good for Balance, Shove, and trip dynamics.

• Moving between roofs

  • Crossing gaps commonly requires:

    • Long Jump for wider streets or alleys.

    • Leap for close buildings.

    • High Jump to reach a higher roof, or Leap → Grab an Edge → Climb to mantle up.

Mechanically, rooftops are ready‑made terrain for chases, ambushes, sniper nests, and vertical puzzles, using existing jump, Balance, and terrain rules.