Despite being a western developed spinoff, Overkill's my favorite of the franchise. The game, on Wii at least (never did end up playing the Extended Cut, even though I think I own it on Steam...) had very satisfying gameplay. The framerate really let it down though. Would have 100%ed it but one last Gold Skull was locked behind the scoring system, which wasn't QAed or something thoroughly because you only get currency if you make the offline leaderboard... making it totally possible to fuck yourself out of money by scoring really highly the first 10 times and never making money ever again.
Otherwise I don't have enough good things to say about Overkill.
The grindhouse style done perfectly
Over-the-top voice-acting kept from the JP games but directed in a different way, giving the audio its own style
Getting 52 headshots in a row and reaching Goregasm
The headshots in this game basically being Gallagher watermelons long before gaming beat that horse to death
The soundtrack
And the writing that made 16-year old me laugh my ass off... same as 30-year old me