Portal Prelude
Portal: Prelude is a video game mod.
It was first published on 10 October 2008. The video game mod was distributed by Mod DB. Portal: Prelude uses the Source engine. Its game mode is single-player video game.
Portal: Prelude is a video game mod.
It was first published on 10 October 2008. The video game mod was distributed by Mod DB. Portal: Prelude uses the Source engine. Its game mode is single-player video game.