Portal 2 + Half-Life 2: Portal 2 + Half-Life 2

Melty lets you combine games in your library. This page is the search URL for a Portal 2 + Half-Life 2 mashup. The Portal Life idea on Portal 2's chambers plus City 17.

Co-op chambers and gels that Melty can join to other owned Valve or puzzle games. The other half of Portal Life: City 17 content joined to Portal.

Melty does not give you Portal 2 or Half-Life 2. If a copy is missing, the app opens that game's store. There is no charge for Melty or for the mashup itself.

Press Play. Melty downloads Portal 2 + Half-Life 2, installs the files the mashup needs, and starts the host game. That is the whole setup path — no separate Vortex profile, no hand-copied folder.

When you uninstall the mashup, Melty puts every file back as it was. Report a mashup from its page if an upload looks wrong; every upload is checked for dangerous files.

If the mashup is multiplayer, Play also gives you an invite link. Keep it private, send it to friends, or open a public lobby.

To make a variant, copy Melty's instructions into Claude Code or Codex and describe how you want Portal 2 and Half-Life 2 to meet. The coding agent builds the mashup and publishes it.