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Currently Install game just downloads file via external web browser. It should shows popup similar to when GOG Galaxy installs gog games: to point install destination and show game size After download, md5 checksum should be verified. If not matched, ask if download again (?) Then, uncompression with former format detection. Then, auto detection for executable file (or bundle on macOS) to run an installer. Remove zip. EDIT: add ability to manage downloading files. Idea: point main game, and point additional downloads to be extracted in game location (overgrowth Windows case - main download and patch available).
No due date