JKA-Web
Jedi Knight: Jedi Academy single-player, running entirely on your machine, nothing uploaded. Start the free demo, or point the engine at your own copy of the game.
Sign in to keep your game data and saves in the cloud - they follow you to any device, nothing to re-pick.
The game data is served from this site - nothing to install or upload. Just click and play.
Best on a fast connection: the data downloads once, then caches.
Point to the GameData folder of a legal Jedi Knight: Jedi Academy install. Files are read straight from your disk, no upload. The single-player campaign is what runs; multiplayer and mods aren't supported.
New to this? Tap the ? for where to find your files.