I'm a big fan of kusoge and janky B-games, so here are some of my faves (in no particular order).
Wrestling Empire by mad genius MDickie, is somehow simultaneously the best and the worst wrestling game ever made. The scope of its simulation is amazing, but to say it's "janky" severely understates the matter. It's jank piled upon jank piled upon jank until the sheer jankitational forces cause it to compress into a semispeherical game-like object.
Bullet Witch is basically Bayonetta's older sister, who got dropped on her head as a baby. Terrible voice acting and ridiculous physics turn it into a hilarious tryhard grimdark cartoon.
Dynasty Warriors 9 is rightfully despised by DW fans, but it's such an utter mess that it's almost endlessly entertaining as possibly the worst open-world game ever made. Just as one example, the animal-spawning routine doesn't take terrain into consideration, so if you go swimming in a lake, herds of confused deer will be swimming with you.
Necromunda Hired Gun really toes the line between "bad game" and "good B-game" but it's worth mentioning because the gameplay is awesome cracked-out psychotic fun even if just about everything else is mediocre at best.
Age of Barbarian is a loving tribute to awful 70s-80s low fantasy movies, done with tongue in cheek. So it's only fitting that it plays like a bad Amiga platformer with maze-like level design and super-clunky controls.
Harvester is perhaps the pinnacle of awful 90s FMV adventure games, and should particularly appeal to people who like Deadly Premonition since it shares a similar quirky Twin Peaks-inspired tone. Don't even bother trying to play it without a walkthrough.
Rogue Warrior is a thoroughly mediocre (although not unplayable) FPS elevated by some of the worst dialogue to ever grace a shooter. Your MC is constantly swearing like a tryhard edgy tween in multiplayer, and it's hilarious. Like "Fuck you, you fucking terrorist asshole motherfucker!!!!" level nonsense.
Also, while I just started playing it a couple days ago, I'm reasonably certain that Earth Defense Force 5 is going to be in my top five good-bad games. I'm loving it. It's a gloriously campy throwback to bad mil-SF alien invasion movies, about Earth being taken over by flying saucers dropping giant bugs.