The Mechanoid Invasion centers on the planet Gideon E, colonized by humans. A powerful, malevolent, and numerous race of bio-driven machines have come to invade the planet. The humans are hard-pressed to defend themselves against the technologically superior invaders.^[1]

The game uses a stripped down version of the Palladium Role-Playing Game rules. Characters have basic attributes (Physical Strength, Intelligence Quotient, Speed, etc.). Hit points are dependent on the character's Physical Endurance. The characters are completed with Occupational Character Classes and their accompanying skills. There are also rules for paranormal psionic abilities.^[1]

In 1981, Palladium published its first role-playing game^[2] as a series of three comic-book sized sourcebooks:^[3]

1. The Mechanoid Invasion covers the invasion of Gideon E
2. Journey, describes human survivors living within a mechanoid mothership after the destruction of the Gideon E colony and introduces "minor magic and some psionics".^[4]
3. Homeworld deals with the Mechanoid homeworld itself.

In 1985, Palladium revised and republished the game as a single book, The Mechanoids.^[5]

In 1991 Caliber Comics produced a 3-book series called The Mechanoids which adapted the game into comic book stories.^[6]

In the early 90s "Sourcebook Two" of Rifts was released, titled The Mechanoids, and it included conversions for the Mechanoids for use in a Rifts Earth setting, along with a storyline on how they got there.^[7]

In 1998 a collected Mechanoids RPG was released, compiled as the Mechanoid Invasion Trilogy^[8] which is still available.^[9]

In Issue 42 of The Space Gamer No. 42, William A. Barton reviewed the original three-book edition and commented, "If you can overlook its amateurish production (and the price helps in this), I think you'll find The Mechanoid Invasion worth the investment. It should provide some enjoyable role playing in an SF setting as a break from Traveller or your other favorite SF RPG."^[10]

In his 1990 book The Complete Guide to Role-Playing Games, game critic Rick Swan was impressed with this game, writing "Concise rules, a slick presentation, and a fascinating setting add up to a gem of a game." The only issue Swan had was with the paranormal abilities, which Swan thought "reads suspiciously like magic spells ... This psionic/magic system contrasts too sharply with the high-tech setting of Mechanoids and should've been left on the drawing board." Swan's favorite part of the game was the "vivid setting" that had humans hopelessly outclassed by the Mechanoids. As Swan summarized it, "The situation is desperate, and the result is a level of tension seldom achieved in a role-playing game." Swan concluded by giving the game a solid rating of 3 out of 4, saying, "science fiction fans shouldn't miss Mechanoids."^[1]

• Different Worlds #31^[11]

• The Mechanoid Invasion official discussion board at Palladium Books Forums of the Megaverse
• The Mechanoid Invasion at RPG Geek Database
• The Mechanoid Invasion at RPGnet Game Index