Château Frontenac is a great building that boosts quests rewards if rewards are Coins coins, Suppliessupplies, and some other stuff.

Unbirthday Party is a recurring quest, where you have to pay an amount of coins and supplies. The exact amount depends on your era.

If you combine those two informations, you can "exploit" the game: If your Château Frontenac boosts coins and supplies rewards that much that you get more as reward than you paid for unbirthday party, you can do unbirthday parties endlessly.

Required Château Levels

This is the formula used to count the needed level:

  • Rs – small Coins/Supplies reward;
  • Rb – big Coins/Supplies reward;
  • P – amount of resource you need to pay.
$ \frac{280 \cdot P}{2 \cdot R_s + R_b} - 40 $

The following table shows which level you need in every age:

Age Age Château Level
for Coins coins
Château Level
for Supplies supplies
Bronze Age 296 240 296
Iron Age 72 72 72
Early Middle Ages 116 116 116
High Middle Ages 147 147 147
Late Middle Ages 100 128 128
Colonial Age 210 215 215
Industrial Age 255 194 255
Progressive Era 240 179 240
Modern 257 189 257
Postmodern 240 167 240
Contemporary Era 209 174 209
Tomorrow 177 167 177
Future 206 240 240
Arctic Future 198 222 222
Oceanic Future 349 385 385

From Late Middle Ages on, you can have 2 recurring quests, which lowers the required level (because you can use the supply/coin reward for fulfilling a supply/coin quest). From Contemporary Era on, you even can have 3 recurring quests, if you did all story quests so far. Story quests appear again, after unlocking sectors in continental map or technologies. To calculate the required levels with 2 or even 3 recurring quests is much more difficult. But empirical, it's safe that Level 150 is enough for Contemporary era (with 3 quests). For Tomorrow even less.


Best strategy is to stay in Bronze Age till level 54 and then go on to the Iron Age - level it to level 72. Then you will have so many Forge FPs that you can easily level every Great Building you want, including Château Frontenac to level 116 to progress to Early Middle Ages.

Important hint: Don't go too far on the continental map! If you scout some sectors on the industrial continent, you get a bonus quest, which replaces the recurring quests. This is bad, when you are in iron age, because you need a technology from industrial age, to fulfill the whole bonus questline.

Other options

From Arctic Future on, there are several "Happiness Quests". You can do these with much lower levels. Which level exactly you need depends on the costs of the deco you use.

In Oceanic future appears a recurring quest "Have less than 42 population available" when you have more than 1020 population available. If you have less than 1063 population available, you just need to build a goods building from industrial age and you fulfill the quest. UPDATE: The poulation quest in Oceanic Future is no longer recurring, so this trick doesn't work anymore.

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