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| Level | Warden Office Lv. Required | Food | Wood | Steel | Gasoline | Upgrade Time |
|---|
| 1 > 2 | 10 | | 200 | | | 8 sec |
| 2 > 3 | 10 | | 1200 | | | 0:00:34 |
| 3 > 4 | 10 | | 2400 | 480 | | 0:01:45 |
| 4 > 5 | 10 | | 10k | 2k | | 0:03:35 |
| 5 > 6 | 10 | | 25k | 5k | 1250 | 0:07:10 |
| 6 > 7 | 10 | | 100k | 20k | 5k | 0:14:00 |
| 7 > 8 | 10 | | 180k | 36k | 9k | 21:30 |
| 8 > 9 | 10 | | 350k | 70k | 17.5k | 0:32:00 |
| 9 > 10 | 10 | | 650k | 130k | 32.5k | 0:43:00 |
| 10 > 11 | 11 | 800k | 800k | 160k | 40 | 0:54:00 |
| 11 > 12 | 12 | 1m | 1m | 200k | 50k | 01:04:30 |
| 12 > 13 | 13 | 1.4m | 1.4m | 280k | 70k | 1:19:00 |
| 13 > 14 | 14 | 2m | 2m | 400k | 100k | 1:40:30 |
| 14 > 15 | 15 | 2.5m | 2.5m | 500k | 125k | 2:09:30 |
| 15 > 16 | 16 | 3.5m | 3.5m | 700k | 175k | 3:39:00 |
| 16 > 17 | 17 | 5.5m | 5.5m | 1.1m | 275k | 4:23:00 |
| 17 > 18 | 18 | 7.5m | 7.5m | 1.5m | 375k | 5:16:00 |
| 18 > 19 | 19 | 9m | 9m | 1.8m | 450k | 7:54:00 |
| 19 > 20 | 20 | 13m | 13m | 2.6m | 650k | 9:52:30 |
| 20 > 21 | 21 | 16m | 16m | 3.3m | 800k | 12:50:00 |
| 21 > 22 | 22 | 20m | 20m | 4m | 1m | 19:15:30 |
| 22 > 23 | 23 | | | | | |
| 23 > 24 | 24 | | | | | |
| 24 > 25 | 25 | | | | | |
| 25 > 26 | 26 | | | | | 2d 12:46:00 |
| 26 > 27 | 27 | | | | | |
| 27 > 28 | | | | | | |