Mine has to be Dragon Quest: Rocket Slime, a DS spin off of the Dragon Quest series that sees you playing as a slime operating a tank and rescuing the people from your town. You run around the overworld, collecting items to use as ammunition and saving money to upgrade your tank. The art and music are just as great as you'd expect from the Dragon Quest series. It made fantastic use of the DS's dual screens. It's also written for a younger audience, so a lot of it is just really silly and fun! Try it out for sure, I'm so sad there's no sequel :(
Control was cool, but at the same time a massive letdown. Like you run into cool SCP like stories and entities and then when the tiny sidequest is over in 5 minutes that's it, done. Some things you never even find out about later on, just like the writers had a cool idea, put the first few sentences there and then didn't know how to continue.
Felt like constantly getting blue balled, compared to just reading SCP posts.