2009 · コアルール（プレイに必要な最小限）
Yesterday's Tomorrow
A retro-science-fiction roleplaying game about the future as imagined from the past. Characters explore a world of speculative technology, Victorian mysticism, high-stakes action, and romantic adventure, drawing on pulp films and early twentieth-century futurism. Players create characters around four core themes—Action, Science, Mystery, and Romance—and use them to guide dangerous, suspenseful stories involving eccentric inventors, adventurers, occult mysteries, and imagined technologies.
特性／アスペクト制（性格がゲームプレイに影響する）属性／ステータス制（STR、CON、PERなど）記述ベース（ダイスよりもナラティブを重視）
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。