Very entertaining, well-made game. Mechanics and instructions are well-explained and available. The various games are refreshing changes of pace from each other and are unique and enjoyable.
Extreme mode in the bunker is extremely difficult, but not unfair in difficulty.
I had some challenges with sprint on lower difficulty (like when you drop a key to sprint but have to fill your bar to 100% to sprint first, or if you're at 100% you have to crouch for a split second to be able to sprint) but this doesn't come into play on Extreme because you basically die if discovered.
Lots of fun, looking forward to cleaning house on ol' Boofie!