Nice Old School RPG, Free2Play (no pay2win) Android, iOS, Windows
My favorite game is The Dark Mod (free fp game for Win, Mac and Linux)
Free download from official page
~3Gb, 1 training mission and 2 real missions.
More than other 100 missions can be downloaded and added in the same game menu.
Include also a wysiswyg game editor when you wish to creat own missions.