1.2.3.4
1 - Major version: this number changes when there’s a very significant addition to the game, many would refer to this as “expansions” (to be clear: we aren’t planning purchasable expansions - our plan is for future content additions to be included as live service updates)
2 - Version: this number changes based on major updates to the game, such as new mechanics, content, or other. This typically refers to the cycle patch
3 - Sub-version: This number changes when there’s a planned update to the game, such as the weekly patches at the start of a cycle
4 - Hotfix: This number is not always present. it indicates a hotfix added to the game - a patch which is made in response to something, rather than as a scheduled patch.
This is 1.0.8.4, meaning it’s the fourth hotfix issued for patch 1.0.8 - Last Epoch 1.0.8 Patch Notes