Suggestions by @brkobergmann

Vince Gilligan

as Director in BLACK MESA: a Half-Life Series

Gabe Newell

as Producer in BLACK MESA: a Half-Life Series

Gabe Newell

as Director in BLACK MESA: a Half-Life Series

Danny Glover

as Eli Vance in BLACK MESA: a Half-Life Series

Naomi Scott

as Alyx Vance in BLACK MESA: a Half-Life Series

Mark Ruffalo

as Barney Calhoun in BLACK MESA: a Half-Life Series

David Hyde Pierce

as Dr. Isaac Kleiner in BLACK MESA: a Half-Life Series

Keri Russell

as Judith Mossman in BLACK MESA: a Half-Life Series

Mads Mikkelsen

as Dr. Wallace Breen in BLACK MESA: a Half-Life Series

Bryan Cranston

as G-Man in BLACK MESA: a Half-Life Series

David Hyde Pierce

as Dr. Isaac Kleiner in BLACK MESA: a Half-Life Series

Bryan Cranston

as Dr. Isaac Kleiner in BLACK MESA: a Half-Life Series

Jake Gyllenhaal

as Gordon Freeman in BLACK MESA: a Half-Life Series