Extracting Nuclear.Option.v0.29.5.zip (typically 7.2 GB compressed, expanding to 18.4 GB) reveals a standard game directory:
The term Nuclear.Option.v0.29.5.zip often appears on third-party sites claiming to offer "extra quality" or standalone downloads. Nuclear.Option.v0.29.5.zip
version 0.29.5, a combat flight simulator set on a near-future battlefield. Patch 0.29.5 Overview Extracting Nuclear