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Since this is a game, you can have your cake and eat it too: put the detailed explanations in sidequests or optional logs. The main plot presented to the player doesn't need to include anything but...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/41395 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
Since this is a game, you can have your cake and eat it too: put the detailed explanations in sidequests or optional logs. The main plot presented to the player doesn't need to include anything but the basic rules of how the aliens are scary and evil. The side material can go into more detail about the nature of the aliens, the details of the invasion, and such. Now your boring exposition has become immersive world-building, and you can be the next _Dark Souls_ (or _Metroid Prime_, or _Majora's Mask_, or _Myst_. This sort of story presentation goes way back.)