Laggy Fantasy Tactics:
http://www.rpgdl.com/lft
It's a very fun mod to play around with if regular FFT is getting a bit routine. It's a bit harder, but it isn't designed as a difficulty patch. From the Foreward:
LFT is a modification of Final Fantasy Tactics, making some dramatic changes to its gameplay while preserving non-gameplay aspects (the story, characters, etc. have all been left unmodified). Through all these changes I would like to believe that I have preserved the spirit of the gameplay itself – the vast array of options it offers, the tactical potential it has always boasted over most SRPGs out there, and above all else, the things that make it such an enjoyable game that has weathered the test of time admirably.
LFT has three main goals:
1. To improve the usability and balance in all aspects of gameplay, without removing options or impeding on personal preference whenever possible. (classes, items, etc.)
2. To reduce the necessity of grind and other tedious aspects of the game. (faster JP gain, easier class unlocks, better poaches, etc.)
3. To streamline the game’s difficulty so that it remained challenging to a player who previously played FFT, without forcing optimization or any extraneous leveling. (Special care has been taken to make sure that SCCs are, as a general rule of thumb, still possible.) To elaborate, m.c. and I playtested with basically no random encounters, no poaching, no beelining for any classic broken setup, etc. These routes are options for players to choose and use as their playstyle sees fit.
It's a fantastic patch, and a Board 8er (metroid composite) was a key part of the design team!
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No amount of planning will ever replace dumb luck.