The Pollux engine (announcement) has been added to new servers since between Feb 11th 2021 and Feb 18th 2021. Everyone receives this bonus engine after watching the first bonus video of a game round. You can win 90 upgrades (1 per day) through watching Bonus videos (now limited to 80 videos per day) to make the Pollux grow from a rail trolley to a true force of the tracks.
The first upgrade you get in each Era seems to be the Era upgrade itself, so your train can haul the goods from current era as soon as you win the bonus.
The Pollux is based on the Milwaukee Road number 261 locomotive, as shown by its distinctive firebox and pilot (cowcatcher) design, red cab windows, and small "Milwaukee Road" logo visible on the tender in certain view modes.
| Pollux | Max stats on 1st day | ||||
|---|---|---|---|---|---|
| Era |  |
 |
 |
 | |
|
1 | 1 | 20 | 1 | 50 |
| 2 | 4 | 30 | 4 | 80 | |
| 3 | 7 | 45 | 7 | 100 | |
| 4 | 10 | 60 | 10 | 120 | |
| 5 | 14 | 70 | 13 | 140 | |
| 6 | 17 | 85 | 15 | 165 | |
| EG | 20 | 100 | 20 | 180 | |
| Earliest possible upgrade in the day of this era when getting all bonusupgrades | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Era | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 1 | +5
|
+1
|
+5
|
+1
|
+5
|
+5
|
+1
|
+5
|
+1
|
+5
|
+5
|
+1
|
+1
|
+5
|
| 2 | Era2
|
+5
|
+5
|
+1
|
+1
|
+5
|
+5
|
+1
|
+5
|
+1
|
+1
|
+5
|
+5
|
+1
|
| 3 | Era3
|
+1
|
+5
|
+5
|
+1
|
+5
|
+1
|
+5
|
+5
|
+1
|
+1
|
+5
|
+1
|
+5
|
| 4 | Era4
|
+1
|
+5
|
+1
|
+5
|
+1
|
+5
|
+1
|
+5
|
+5
|
+1
|
+5
|
+1
|
+1
|
| 5 | Era5
|
+5
|
+5
|
+1
|
+1
|
+5
|
+5
|
+1
|
+5
|
+1
|
+5
|
+5
|
+1
|
+5
|
| 6 | Era6
|
+1
|
+5
|
+1
|
+5
|
+1
|
+1
|
+5
|
+5
|
+1
|
+5
|
+1
|
+1
|
+5
|
| EG | +5
|
+5
|
+5
|
+5
|
+5
|
+5
|
- | - | - | - | - | - | - | - |