Escape from City 17
[View higher-res version here on Purchasebrothers.com]
Directed by The Purchase Brothers - the 2-parter Escape From City 17 short film series is an adaptation based on the Half Life computer game saga by Valve Corporation. "Originally envisioned as a project to test out numerous post production techniques, as well as a spec commercial, it ballooned into a multi part series. Filmed guerilla style with no money, no time, no crew, no script, the first two episodes were made from beginning to end on a budget of US$500."
Source: Warren Ellis