2018 · ソースブック（プレイを拡張するルール／オプション）

The Frontier Companion Vol. 3

This sourcebook collects material for The Frontier RPG, including nine guardians left behind by the Prometheans to protect forgotten ruins and alien installations. These level 3–9 encounters use advanced energy weapons, rapid regeneration, and other abilities to challenge experienced parties. The book also introduces more than 30 laser weapons, from pistols to cannons, with effects such as holographic projections, robot disruption, beam splitting, and supercharged attacks. A Bodyguard character option focuses on protecting allies with an implanted energy shield, which can absorb damage, create force barriers, teleport, and gain new powers through special cores.