Portal: Revolution is a significant fan-made modification for Portal 2, released in early 2024, that acts as a standalone prequel set between the events of Portal and Portal 2 Regarding the specific version and repack you mentioned: Version 1.7.0 and Repacks Version History
However, the official versioning has not reached 1.70. The mention of "v1.70" in your keyword is either a typo or an indicator of a using inflated version numbers to appear more desirable. portalrevolutionv170repackkaos