Maybe 50% of the ships are from Tyrian, but then another 45% of them look like they could have come from Tyrian because they are by the same artist (Daniel Cook). Those ones were from another couple of his art packages that he released for free.
As a way to give back to the indie community, all of the graphics that our new artist Phil is creating we are going to release for free as packages. Both Phil and I are hopeful that this will help other indie developers get a better start with their own games, like Daniel Cook helped to launch AI War through his packages.