The third LT game of 2021 has just been announced to start in "late February or early March". LT61 will be a classic Longturn game with a Longturn Traditional ruleset (LTT), continent(s) and mixed victory conditions.
By the words of the admin:
Most of the single player rulesets have a relatively low start with less things to do in the early game. However, LTT is tuned for multiplayer. There are not only more start units and faster initial growth but the tech tree was cost-adjusted for better multiplayer experience. You can still get gunpowder by T50 (roughly) but the late techs will take more time. With the usual setups the exponential growth makes it possible to get airplanes and missiles by T90 (roughly) by focusing on economy before the industrial revolution.
Now with LTT the economical explosion, is much harder before the industrial revolution. What this basically means is that players can choose between way more strategies than before. It's not like there wouldn't have been a choice in the past but now there are even more options, but until now the games were designed to last 120-150 turns. Now this span is roughly 80-150 turns. Ending the games early is more easy if the rest of the players are simply farming and not attending all the aspects of their empire.
Yet the game remains quite familiar to those who know the old games.