Kitty Letter is a free word game developed by Exploding Kittens for Android. It is a head-to-head competitive game where players unscramble words using their enchanted language vortex from the multiverse of infinite vocabularinities. The game is set in a universe where legions of exploding cats threaten players, and the only way to protect themselves is through vocabulary.

In Kitty Letter, players collect power-ups from dysenteric deer and try to stop their crazy cat-collecting neighbor from destroying their house. The game offers an extensive single-player campaign featuring an all-new story by The Oatmeal. Additionally, players can play with strangers or friends in 1v1 online games. The game does not require collecting cards, coins, or leveling up anything.

Overall, Kitty Letter is a fun and addictive word game that will keep players engaged for hours. The game offers a unique blend of competitive gameplay, storytelling, and vocabulary building. While the game offers cosmetic items for purchase, they do not provide any in-game advantages.