If you are using Wordpress.com is not allowed. And on self hosted WP the Iframes are removed, you need to install a Plugin to embed iframes.
A member registered Dec 14, 2015 · View creator page →
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Introducing Game Embeds comments · Replied to CRAZY K GAMES in Introducing Game Embeds comments
Hi, I don't think so. I'll keep this simple and small. There is already a team that look very serious working on new Half Life episode -Project Borialis- I have applied to work with them and anyone with interest should apply with them too.