9 ways to play together
Multiplayer browser games
Sliced by how many people can actually play and whether they need to be in the same room. Nothing to install, so a link is all it takes to get a game going.
These come from IGDB’s per-platform multiplayer records — player counts, co-op flags and split-screen support — rather than from the coarse Multiplayer game mode, which only says that more than one person can play. Where a game has browser-specific numbers on file, those are the ones used.