This isn't exactly specific to the Deck, but I don't think I would have discovered this if it weren't for the Deck.
Lately I've been really enjoying a new-ish genre of games I would call "Horde Survival" games. Both on Deck and on my desktop PC.
The game that popularized the genre is called
Vampire Survivors. For some reason they (usually) all tend to look horrible and have ugly UIs, which is why I took one look at Vampire Survivors a few months ago and said, "Nope! Not for me!" But then I actually saw a video of the gameplay of one of them, called
Boneraiser Minions, and I thought it looked kind of fun.
They're kind of like twin-stick shooters, except you (usually) only control the movement of your character, and if an attack can be aimed it is (usually) just aimed in the direction your character is facing/moving. Hordes of enemies attack you from all sides, and your attacks/skills are (usually) automatically cast. You collect XP from your fallen foes and when you have enough XP to level up you get a random selection of skills to acquire or upgrade. And with that, you move around trying to stay alive long enough to defeat the waves of enemies and the boss(es).
Also, they are (usually) only $2-$4 each, so I figured it wouldn't hurt to find out if it was fun. And well, like I said, I've had a lot of fun. I've gotten several hours worth of fun from the 3 I've tried, and I think there's still many hours more fun left in them.
This is the video that finally got me to try them out, featuring Boneraiser Minions:
The same day I saw that video I bought both
Boneraiser Minions and
Vampire Survivors.
And then just two days ago I was perusing Fanatical's bundles when I saw that another game in the same genre, called
Nomad Survival, was in the
Killer Bundle 23. I felt the other games in the bundle looked interesting enough, so I got 6 games for $3.50, which is just $0.50 more than Nomad Survival alone would cost. (Incidentally, that was also the same time I got the
Summer Mystery Bundle I posted about.)
Anyway, I've been really enjoying Nomad Survival as well, though I'm finding it initially much easier than the others. As in, I actually beat the first stage (which takes 30+ minutes) on my first (and second, and third) try. Whereas in the other two games I usually died within the first few minutes on my first try and had to buy several upgrades and try a few/several times before finally succeeding. But Nomad Survivors allows you to set modifiers to increase the difficulty, which also increases the rewards you receive. So I'm not too concerned about it being too easy, since I can always just make it harder if I want to.
TL;DR: I think Vampire Survivors and other "horde survival" games are pretty fun, and if you dismissed them out-of-hand like I did just because they're ugly, I highly suggest you give them a try. For $2-4 each, there's not much at risk. And if you buy one and find that you really hate it you can always refund the game if you play it for less than 2 hours.