Passing mechanics are typically functional, but uninteresting—players continue taking turns (and spending resources) until each has passed and the next round begins. Designer Touko Tahkokallio has gone the extra mile to turn passing in Eclipse into an important, interactive, and rewarding aspect of the game.

Designer Touko Tahkokallio's elegant solutions to two common UX problems in 4X games: attacker's guilt and the higher combat risk for attackers.