Change 1 letter in a video game's name

Taints Row - a mod for Saints Row that turns all the guns into dicks

Finball - Fish compete in the ultimate sport. Go for the gills! Finner take all! Can you make it to the guppy bowl?

The Walking Deaf - What?
Blue Nose - A smurf adventure
Counter Stroke - Don't let em touch your la la la
Pubetractor - harvest all you can
Lubez - Use only the best
Dead Tits - Save all the birdies (get your mind out of the gutter ;O)
Fear Esther - she gonna git yoo
Devils Stare - staring contest
Divine Slice of Lime - collect the limes and cut em up

(stretching the rules)
Project ARSE - Pagani Edition - A top secret project is about to astonish the entire world.

VVVVVW, an indie game about a space crew that gets lost with their ship, only to let one of them find his mysterious twin brother.

bad rats = bad fats :)
a game about why fats are bad. simple is that lol

Star Wars Dank Forces - Pepe the frog is recruited by the rebellion to spray paint seditious memes all over the Empire

Prototire - An entire game about making the Prototype for your first tire.

Baldur's Date - A fantasy dating sim ("do you want to see my two handed staff?" ( ͡° ͜ʖ ͡°) )

Puppy Fog: Jigsaw Puzzles - The first Jigsaw made entirely out of fog. Will you be able to discover the puppy faces out of that fog?

Paper Mario and the Thousand Ear Door - Mario must collect all the missing crystal ears to discover the aural secret behind the thousand ear door. What sort of waxy hi jinx will ensue? Will Princess Peach ever whisper sweet nothings to Mario?

Overwitch - game about jumping higher over witches than others. Features black cats by the dozens. ARG points to Salem. Fans arrive to Blizzcon on brooms.

Fitman

Sakura Spirits - drinking simulator where your whole goal is to get Sakura drunk.

This War of Wine: In a world where everything is ruinned because of the alcohol... A guy drunk AF steals on ppl houses to quench his abstinence

Serious Ham 2 - The hero everyone was waiting for is finally here.

Mount & Blade ==> Mount & Blame - The pregnancy blame game!

Socket League: a football variant that instead of a ball has a giant plug and in the place of the goal it has wall with multiple types of socket, the chalenge being getting the plug in the proper socket. Most matches end 0 - 0 tho.

Three Lead Zed - a short visual novel that tries to raise awareness of lead poisoning.

Star Wars: Dork Forces - You must guide Cadet Kyle Katarn during his finals week at the Imperial Academy.

Wolfenstein: The Mold Blood - Stop the development of a new kind of bioweapon that only affects bread in this exciting action-packed adventure.

StareCraft - Face opponents of all shapes and sizes in the Koprulu sector...and that's about it.

Remember Mew - After Mewtwo first used the move Amnesia, it forgot about everything except for one mysterious entity - Mew, and must embark on a soul-searching journey for his identity.

Deus Ex: Invisible Car - Tackle one of the toughest challenges you will ever face-finding your invisible parked vehicle after a wild night out.

Hipman - A man armed with only his swinging hips is on a quest to destroy all hipsters in order to become the one and only Hipman.

Fairy Fence F - After receiving a failing grade, the proprietor of a perfectly legitimate business is out for revenge against the corrupt municipal business rating agency.

MBA 2K18 - Climb the corporate ladder in the newest installment of the simulation series.

Dear Ester - A man explores his past love affair with a chemical compound.

Mead Rising - When drinks come to life, humanity must band together in an all-out party to eradicate this new threat on public morality.

Dreamfall: Chopters - Be the first one to puzzle out the design on a helicopter-motorcycle hybrid!

SinCity - No more Mr. Nice guy mayor. Organized crime is the way of future cities.

Bunless Sea - In a world with no more hotdog buns, you must venture out to sea to seek the legendary Source of Buns to restore order to the restaurant industry.

The Bat Lady - No longer content to be called Batwoman, Kate Kane must undergo rigorous training to become a more refined lady.

The Sapper - Play as Thomas Hancock from Commandos in his own spin-off game!

Yes Origins - In a kingdom where everyone could only say no, a being fell out of the sky and shocked the populace by uttering yes.

Aran Wake - Samus must fake her death and take up the fight once more from the shadows.

Bao-Dur's Gate - Unable to cope with his actions on Malachor V, Bao-Dur develops a time portal in an attempt to alter the past.

Broken Wage - When a computational error at payroll causes a windfall for you, you must hack the planet to ensure that your newfound lavish lifestyle is not threatened.

Fave Story - You must pick a book for grandma to read for you at bedtime before is too late!

Diabro - Think your brother is the devil? Wait until you see Diabro!

Back Mesa - A freak accident accidentally fuses Jedi Master Yoda and Gungan general and diplomat Jar Jar Binks together.

Matchmen: The End Is Nigh - A philosophical drama on the meaning of existence, featuring people with matchstick as bodies that burn out quickly.

Dorm - just like Doom, it's an R rated game.

Dish Honored -- a casserole-playing game.

I might have spent a bit too much time on this, but it was enjoyable, so it's okay, I guess.
After looking through part of my library, I found a few names to change, enjoy:

Allen Swarm: a whole horde of famous people named Allen (either first or last name) chases you, for unknown reasons. Features great names, such as: Woody Allen, Tim Allen, Allen Carr, Allen Iverson, and many many more.
(Original game: Alien Swarm )

Company of Zeroes: These soldiers thought they were the best that ever happened to the army, but boy, were they wrong. Become one of them as you find out what war really means: friendly fire, bullying, disrespect.
If you enjoy this game, be sure to check out the sequel.
(Original game: Company of Heroes )

Becolder: a game raising awareness about the environment, by showing how setting your home thermostat lower helps.
(Original game: Beholder )

The Pan: a lonely sausage falls down and down, trying to find meaning in this life, until he hits the frying pan, and dies, satisfied.
(Original game: The Plan )

Sniper Lite 3: the third part of the succesful, though quite short, series about snipers.
(Original game: Sniper Elite 3 )

Evo explodes: a game about a short-tempered robot.
(Original game: Evo explores )

Bomb Raider - No bomb is going to be left untouched.

ShadowPun. The game where I make ridiculously bad puns.;)