Got interested in the game. Played it a lot. Lost everytime at 10 year - quarter century quest. Playing at 1.0.1 version in android.
Can you guys help me get the link for the 1.4.1 version of the android? Because I kept losing so many times even when I made a great Dragon...
I don't know about the download link, but given the time frame, I think you're talking about the "reduce morale" quest, the "enhance lair" quest, or the "protect lair" quest (names made up by me). You only need to fulfill these once, but you always have to fulfill them as part of the story progression.
For the first, gain notoriety and let the army mobilize, then reduce their morale (either paying at smuggler island or causing massive damage/poverty).
For the second, get a new lair (or upgrade your starter lair), then hire guards (smugglers) and servants (gremlins), as well as installing traps (mechanical ones, bought from gremlins). Having your children work as guards and/or servants is also an option.
For the third one, have any lair and attract a thief or knight and kill it. The thief can be killed by any means (mechanical traps, magical traps, any of the guards or yourself). In the case of the knight, he can be instantly "killed" if he tries to save any "horny" girl from your dungeon (ogress counts, but has a different way of dealing with him). Remember that the girl he tries to rescue is chosen at random, "proud" girls will instigate a fight, while "bashful" girls will try to escape. If you made a pact/deal with the prisoner he chose, the interaction changes greatly.