Featured mashup videos of the week, including 'Aliens' plus 'TRON', 'Girls' as a horror movie, 'Pacific Rim' plus 'Powerpuff Girls', and another Source Filmmaker video.

Featured mashup videos of the week, including The Matrix / Office Space, Flight of the Conchords redone in Source Filmmaker, Taken Nemo, and Star Trek 'Call Me Maybe'.

Fans are making funny videos with Valve's free Source Filmmaker (SFM) tool, and we've collected five more of them, including 'Austin Powers' and more.

Featured mashup videos of the week, including Duke Nukem reading '50 Shades Of Grey', Batman re-cut, and 'Pulp Fiction' and 'Back To The Future' with 'Team Fortress 2' characters.

Valve's Source Filmmaker is available for free, and fans have already created these fourteen silly videos with 'Team Fortress 2' characters.