> For the complete documentation index, see [llms.txt](https://orbcity.gitbook.io/orbcity/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://orbcity.gitbook.io/orbcity/building/upgrading-system/tier-up-evolution/chance-of-tier-up.md).

# Chance of tier up

<table><thead><tr><th width="162"></th><th>C->R</th><th>R->E</th><th>E->U</th><th>U->L</th></tr></thead><tbody><tr><td>Success %</td><td>70.00%</td><td>45.00%</td><td>25.00%</td><td>10.00%</td></tr><tr><td>Fail %</td><td>22.50%</td><td>41.25%</td><td>56.25%</td><td>67.50%</td></tr><tr><td>Destruction %</td><td>7.50%</td><td>13.75%</td><td>18.75%</td><td>22.50%</td></tr></tbody></table>

The table above shows the probability of a tier-up succeeding and failing, and the probability of being destroyed when it fails.

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**Note: Please note that all figures are subject to change by governance.**
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