hello,
For ZODTTD, i think that Underclock dont works properly, i underlock to 20mhz, in 1.7 the game wins 5-6 fps, but now in 1.8 it lose that, then i put the clock other time in 33mhz, but the games dont recovery her initial fps, now i underclock to 10mhz and WOW LOM fullspeed. Saludos!