Kay

The early puzzle-platformer indie success story Braid was released in 2008 for Xbox 360's XBLA, and then a year later it was ported to Mac and Windows (and to Linux another year after that).

While retaining its support for Xinput controllers, the PC version of Braid was also updated to support play with the keyboard's arrow keys, spacebar, and shift. Due to the game's minimalist "no-config-menus-or-tutorials-ever" approach to introducing its controls, in-level signposting indicating which button to press to jump or rewind had to be semi-dynamically loaded depending on whether you were using a keyboard or controller.
Despite not offering real control configuration, players unhappy with the default keybindings weren't without *any* options; the game has a 'secret' set of alternative keyboard controls: instead of arrows keys and spacebar, you can use WASD and Z, respectively. In keeping with the game's principles, this feature is only ever hinted at in-universe, with this pile of blocks on a shelf in the overworld house's bathroom. Not only were these alternative mappings useful for players who are more comfortable playing with their hands in different positions than on the arrow keys/shift/space, they also enabled FPS-seasoned PC gamers to play with (only!) their left hand in a familiar WASD+shift+spacebar position.