Deathtrap looks like an interesting mix of tower defense and action-rpg/hack'n'slash. I enjoyed the developers' first Van Helsing game but it had a lot of bugs & glitches. They did support the game well with several patches and even some free DLC but I am hoping this time they finish the game before releasing it.
The Cave looks like a fun adventure game in the style of Monkey Island and then and such as.
KI season 2 Ultra Edition basically means you get the characters TJ Combo, Maya, Aganos, Kan-ra, Hisako, ARIA, Riptor, Cinder and Omen, as well as a bunch of costume pieces, and you also get the standalone version of the old KI2 arcade game, which feels really weird to play on an xb1 controller and has annoying achievements!
Rayman Origins is one of the best platformers ever made -- play it alone, or with up to 3 friends, and you will have fun. It is also nice to look at with a great hand-drawn art style.