So World of Warships is in closed beta, but for Wargaming's 4th anniversary they released a game mode set on a grid in "space" and a half-dozen or so special ships to play on it - including an actual Space Battleship Yamato, Takao's ship form from Arpeggio, and a few other funny things. It's pretty neat.
It's even more amusing because they announced they were going to do this on April 1 and everyone thought they were kidding...