Schizoid is pretty weird. Kinect Party / Double Fine Happy Action Theatre. Haunt. Space Giraffe. Fez, but it has a pretty sellable veneer so I don't think the weirdness of the game really impacts its presence on the market. Not sure what else I'd consider weird. Leadmees, although I didn't particularly enjoy that. Hole in the Wall. Actually a lot of the Kinect stuff is weird, which I guess is similar to how Move is used for more experimental stuff too.
Yeah I guess Space Giraffe and Rez are weird, though those types of games are not that unique anymore with the likes of Child of Eden and Dyad joining the scene.
The others not so much. Kinect Party, Happy Action Theatre, Hole in the Wall are gimmicky party mini games, akin to Move's Start the Party more than the experimentalism of Datura. The OXM review for KP reads, "Its giddy, family-friendly spirit makes Kinect Party a perfect game for adults and kids alike..." You call that weird? Haunt also was developed as a game for kids and looks like something Disney would do.
Fez is not weird, it's a clever puzzle platformer with a quirky mechanic.
The entire Twisted Pixel catalog of games.
I don't really think they are weird either. I see the Splosion games and they look like your standard action platformers with that quirky gimmick again. Lococycle is shaping up to maybe fit the bill, but weird is something like NobyNoby Boy. I mean read this:
The player takes control of a worm-like quadrupedal character referred to as BOY.[5] Using the controller, the left analog stick moves the front of Boy while the right stick controls the back. By moving both ends in opposite directions, the player can stretch Boy's abdomen to great lengths. The player may maneuver Boy around its environment, interacting with stationary objects like houses, or AI-controlled characters such as barnyard animals.