Previewed by Angel Washizu. "The models looked fantastic and I only saw a few really rare bugged models, and even they looked pretty cool, if not, weird (and when has weird not been cool?)."

Previewed by Peter Suciu. "These boundless combinations also should mean that Sigma might offer unparalleled re-playability, especially if coming up with variations in your creations interests you."

"With Sigma, we're looking for an opportunity to create technology that gives players the freedom to create a game that is uniquely tailored to their style of play."

Preview includes screenshots and an in-game movie. "With 40-50 animals to choose from, and around 31,000 combinations, you'll have your wicked hands filled making the most unearthly creations imaginable."

Interview with Alex Garden, CEO of Relic Entertainment.

Preview by Dragon. "Relic describes it as offering short, fast-paced games that can be completed in under an hour."