Hi, I saw your OSRS review. It is actually possible to get the Jagex Launcher and thus Runelite through Steam. There are a couple of youtube videos about it. Still counts your hours, but not the achievements if you still need to get those.

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⢠⠊⣉⠒⠤⢀⡀          ⡐⢁⠴⢜⢄
 ⡎⢸  ⠉⠐⠢⢌⠑⢄    ⡸  ⡆    ⠣⠱⡀
 ⡇⢸        ⣀⠗  ⠉⠉⠁  ⠙⠢⠤⡀⢃⢱
 ⡇⠘⣄⢀⠔⠉                    ⠈⠁⠘⡄
 ⢇    ⠁                              ⠘⡄
 ⢸            ⢀⣀⣀⡀        ⢀⣀⣀⡀  ⢣
 ⡸        ⢴⣾⡿⠿⠽⠇        ⠘⠛⠛⠛  ⠈⢄
⠰⡁              ⢠⠒⠢⡀⠈⠒⠊  ❤ ⡠⢄  ⡘
 ⠱⣀          ⢀⠜    ⠇        ⢀⠔⠁  ⡏
     ⠑⠤⢄⣀⠔⠁    ⡜        ⠊⠁  ⢀⠜

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⣶⣍⣉⠉⠉⡇⠀⠀⠀⠀⠀⠐⠛⠿⣇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡄
⠹⣿⣿⣷⣦⣄⣀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣰⣿⠁
⠀⠈⠻⢯⣤⣶⡂⠀⠀⠀⠀⠀⣤⡄⠀⠀⠀⠀⠀⠀⠰⠄⠀⠀⠼⣿⡏⠀
⠀⠀⠀⠈⠻⢿⣿⣶⣤⣤⣤⣾⣿⣦⣄⣀⠀⠀⣀⣽⣿⡿⠿⠛⠻⣿⣧⠀
⠀⠀⠀⠀⠀⣠⣾⣿⣿⢿⣿⣿⣿⣿⣿⡿⠿⢷⣾⣭⣄⣀⠀⠀⠀⠈⠻⣇
⠀⠀⠀⠀⠰⠛⠋⠁⠀⠀⠀⠀⠉⠉⠉⠀⠀⠀⠀⠀⠈⠉⠉⠒⠀⠀⠀⠀

⢰⣶⣶⣦⣝⢝⢕⢕⠅⡆⢕⢕⢕⢕⢕⣴⠏⣠⡶⠛⡉⡉⡛⢶⣦⡀⠐⣕
⡄⢻⢟⣿⣿⣷⣕⣕⣅⣿⣔⣕⣵⣵⣿⣿⢠⣿⢠⣮⡈⣌⠨⠅⠹⣷⡀⢱
⡵⠟⠈⢀⣀⣀⡀⠉⢿⣿⣿⣿⣿⣿⣿⣿⣼⣿⢈⡋⠴⢿⡟⣡⡇⣿⡇⡀
⠁⣠⣾⠟⡉⡉⡉⠻⣦⣻⣿⣿⣿⣿⣿⣿⣿⣿⣧⠸⣿⣦⣥⣿⡇⡿⣰⢗
⢰⣿⡏⣴⣌⠈⣌⠡⠈⢻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣬⣉⣉⣁⣄⢖⢕⢕
⢻⣿⡇⢙⠁⠴⢿⡟⣡⡆⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣵⣵
⣄⣻⣿⣌⠘⢿⣷⣥⣿⠇⣿⣿⣿⣿⣿⣿⠛⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿
⢄⠻⣿⣟⠿⠦⠍⠉⣡⣾⣿⣿⣿⣿⣿⣿⢸⣿⣦⠙⣿⣿⣿⣿⣿⣿⣿⣿
⡑⣑⣈⣻⢗⢟⢞⢝⣻⣿⣿⣿⣿⣿⣿⣿⠸⣿⠿⠃⣿⣿⣿⣿⣿⣿⡿⠁
⡵⡈⢟⢕⢕⢕⢕⣵⣿⣿⣿⣿⣿⣿⣿⣿⣿⣶⣶⣿⣿⣿⣿⣿⠿⠋⣀⣈
⡵⡕⡀⠑⠳⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⠛⢉⡠⡲⡫⡪⡪