Bonus engine
An engine that takes no slot, bought in the shop from 1,000 prestige or won at the lottery or in competitions; valid for the current round only.
A bonus engine takes no slot in your Engine house.
Getting one
- Bought in the shop from 1,000 prestige, alone or in an era pack, depending on the world and the engines you already own.
- Won at the lottery (from level 2) or in competitions.
- Valid for the current round only: on a new round or another world, it must be won or bought again.
- The price of some bonus engines drops when they are bought in a later era.
The bonus engines of each era
- Freight: Milan royal (era 1), Taureau (2), Isis (3), Zeus (4), Sphinx (5), Valkyrie (6).
- Passengers: Libellule (era 1), Kangourou (2), Electra (3), Hadès (4), Icare (5), Vénus (6).
- Each one can also be won at the lottery or in the competitions of the next era.
Special bonus engines
- Pollux: free, unlocked and upgraded by watching bonus videos.
- Magnus: cannot be bought; from a power bonus or a city project, it grows with each era.
- Titan and Aurore: endgame engines, 2,500 gold each in the shop.
- Others exist, such as Primus, Brise-glace / Freshmaker, Le Train and, in Perfect Paradise only, the Paradise Train.
Bonus engines cannot be researched in the Laboratory.