Algol: The first published Mekton setting. A chilly world on the brink of an impending ice age, Algol is home to a lost colony of humans struggling to survive against an increasingly hostile environment, alien invasion, and each other. Was Rebooted with each edition before being abandoned due to editorial policy changes- or was, prior to Mike Pondsmith's taking control of the company. Makes a comeback in the upcoming Mekton Zero.
Bendar Empire: Introduced in Mekton Empire, a Mekton II supplement - The Bendar Spiral Galaxy is home to a vast and ancient Imperium in decline. The forces of darkness threatens the Imperium from without while decadence and decay destroy it from within. It is a time of adventure and intrigue, of political machinations and star-spanning battles. Mekton Empire provides epic scope to the game of Mekton. Giant battlefleets ply the void, scheming politicians maneuver for power, and great mysteries hide secrets that could destroy, or save, an entire Galaxy. Mekton Empire is a cross between Dune and Five Star Stories, where characters can become heroes for their deeds of honor and turn around to be stabbed in the back by their closest friend. Abandoned, but containing the Algol setting as yet another planet.
Jovian Chronicles: Originally a setting for Mekton II created by Dream Pod 9, before being published as a game in its own right under a different system. Has been described as "American Gundam" (well, Canadian Gundam actually), revolving around a conflict in our own solar system between the powers of the Jovian Confederation and the Central Earth Government and Administration.
Invasion Terra: The default setting for Mekton Zeta, with Earth being invaded by an expansionist galactic empire. Heavily influenced by Super Dimension Fortress Macross. Initially developed as a test-game for the Zeta edition before being published.
Imperial Star: Introduced in Mekton Zeta - similar to Mekton Empire, but set in our own galaxy. Written up in the Mekton Zeta rulebook before being abandoned.
Starblade Battalion: The last published sourcebook in the Mekton line to date. A sequel to Cyberpunk 2020, but set so far in its future that you wouldn't notice. Earth and its Pleiades Colonies locked by their respective governments in a war that nobody really wants, that the titular Starblade Battalion (a rebel group made up from disidents of both sides plus Space Pirates) tries to stop. Easily comparable to Zeta Gundam, or the more recent Gundam 00.
Gundam Senki: Japanese release only - a licensed Gundam RPG [[note: specifically, the Universal Century's One Year War, although supplements covering other eras were planned.]] using the Mekton rules. An English-language release was planned, but fell through.
Virtual Mekton : Teenagers battle it out in virtual-reality mecha combat, in between school and other activities. Inspired by the game Virtual-ON and the manga Break-Age
A new edition of Mekton has been bandied around since the ninties under various names such as Mekton Double Zeta and Mekton ZERO. However, the game itself has been essentially out of print and all attempts to revive it have thus far resulted in extensive delays and cancellations. Mike Pondsmith has, however, informed the Mekton Z mailing list that he's working on Mekton Zero. Given that RTG finally released Cyberpunk V3 after nearly a decade, there may yet be hope; the well-funded Kickstarter project isn't slipping yet from its 2014 loose deadlines.Mekton provides examples of the following tropes:
Every so often, something crops up in anime that is just, well, excessive. Planet-sized battle fortresses, galaxy-destroying beam cannons, machines that can rend time and space... such things are pretty common in anime, really.
Author Existence Failure -subverted. RTG's been said to have gone out of business on multiple occasions. They actually just work at speeds rivaling glaciers.
Point Defenseless: Somewhat averted in that a properly-designed point defense system can utterly shred Mektons, and do it from a much further range than they can be effectively replied to. However, for this reason, many GMs prefer NOT to properly design their point defense systems.
Proud Warrior Race Guys: The invaders in Invasion Terra are depicted as a warrior culture with a strict code of honor. Consisting primarily of clones of their finest warriors, scientists and other specialists, they seek to subjugate other humanoid species whenever they encounter them.
Purely Aesthetic Gender: Except that females have a slightly higher chance of having psionic powers if those rules are used.
House Rules: Although slightly encouraged all around, The Mekton Z+ rulebook makes it clear that the method provided for determining random psionic abilities in PCs is just a suggestion and that referees [the Game Masters] have the final say in how to determine them.
Railroading: The Operation Rimfire module for Mekton II read more like a script then an adventure - everything was predetermined, right down to the villain's Narmy death.
Despite the railroading, Rimfire is easily the single most popular Mekton module there is, which says a lot about the Mekton playerbase.
The Tetris Effect: If you're on the mailing list, odds are this trope probably applies. A casual player wouldn't take the time to stat Tupperware, after all.
Wave Motion Gun: You can set up a charging time for your energy weapons, which gives a steadily more significant discount as the time gets longer. Add this to Mega-Beam, which lets you hit every location on your target at once, and make the weapon big enough...