Put The Bunnies In The Box: Mayhem Triple
To complete Mayhem Triple, you will have to kill hundreds and hundreds of rabbits but rather than being an exercise in plentiful poaching, Dustin Gunn's game concerns an alien invasion. The aliens just happen to look like bipedal rabbits, who wander back and forth quite nonchalantly. They're not particularly bright but it would appear that they've been breeding very much in the manner of their Earth counterparts. There are loads of them, which means you'll need all to make use of all the Max Payne/John Woo style diving, dodging and shooting at your disposal. Mayhem Triple is The Specialists mod, but single player and in 2d. It's also completely free.
Did Dustin despise Jazz Jackrabbit when he played it as a nipper? That's one explanation for the ultraviolence committed against all of these rabbits. The silliness of the rabbit enemies shouldn't alarm anybody who fears an overabundance of zany humour, even if you did also spot the bombs in the trailer above. The ones shaped like male genitalia that quite literally drop a bollock when they attack. It's mostly extremely competent side-scrolling action, with a fair bit of variety and an extremely generous playing time. Every minute is generous really, the game being free and all.
The bulk of the humour didn't tickle me but almost every part of the action did. It really is a superb slice of slaughter-pie and an incredibly polished one too. Not that pies should ever be polished. Glazed maybe? That sounds horrible as well. I give up. Just go and play the game.
Having said that, I haven't finished it yet so it's entirely possible that it either becomes hilarious or so grotesquely offensive that it'll melt your face off. I doubt it though. But do expect to be bombarded by metallic testicles.