A browser tab can render real 3D these days — WebGL got good enough that a low-poly explorable world or a full racing game loads and runs at a playable frame rate with nothing installed. These three are the ones worth trying first.
Haunted Castle — a low-poly exploration game
Haunted Castle drops you outside a dark, low-poly castle lit mostly by flickering torchlight, with a simple objective to explore toward. It's built specifically for this kind of quick, no-download session — walk around with WASD, no menus or installs standing between you and the game.
Derelict Station — the same idea, a very different world
Derelict Station uses the same underlying 3D engine as Haunted Castle but is a deliberately different environment: a cooler-lit, sci-fi station with pipe struts and circular viewports instead of castle walls and archways. If you've played Haunted Castle, this is worth trying next specifically because it doesn't feel like the same game reskinned.
HexGL — a full 3D anti-gravity racer
HexGL is the most technically ambitious of the three: a WipEout-style anti-gravity racing game with real 3D tracks, boost pads, and a working physics model, all rendered live in-browser. It's one of the better demonstrations of what WebGL could do without a native client, and it still holds up.
Why this matters more than it sounds
Every one of these ships without a CDN dependency — the 3D engine each game uses is bundled directly into the game's own files, so they keep working offline once cached and never break because some third-party script went down. That's a deliberate choice, not an accident: a 3D game you can't trust to load reliably isn't actually more convenient than installing something.
Want more? The full catalog — including 2D games, puzzles, and racers — is on the Elipar homepage, or browse by Adventure and Racing directly.