Some LF2 mods (Naruto: The Setting Dawn, for one) pack their program and game files into a protected
.exe that OpenLF2 cannot read. This page plays them as they are, in
BoxedWine: a Windows emulator that runs Wine in your browser.
It is much slower than OpenLF2 and than a PC, and needs a recent desktop browser with plenty of memory.
The first start downloads the emulator with Wine (about 200 MB) and the mod from the online relay; your browser keeps them for later visits. Windows then takes a minute or more to start the game. Network play does not work here; everyone plays at one keyboard.
Click the game first, so that it gets your keys. The mod's own keys apply
(data/control.txt): player 1 usually moves with W A S D and
uses J attack, K jump, L defend; F1 pauses, Esc leaves a match.
The emulator is BoxedWine (GNU GPL 2.0 or later) with Wine (GNU LGPL 2.1 or later): what it is made of and its terms are in LICENSES.txt. The mods belong to their authors; this site plays the copies its relay keeps.