Solitaire now has a Halo theme.
Microsoft Solitaire Collection, which, by the way, is available via Xbox Game Pass for PC, now has a Halo theme that lets you add a UNSC background and Halo-themed card backs.
Fans will spot Cortana rooting for the clubs and Master Chief playing for the spades. There are other Halo characters on the cards, too, but I won't spoil the surprise.