Brotato
Brotato is a top-down arena shooter roguelite where you play a potato wielding up to 6 weapons at a time to fight off hordes of aliens. Choose from a variety of traits and items to create unique builds and survive until help arrives.
Why on Deck
Brotato was one of the most-played games on Steam Deck for a reason. Runs take 20–30 minutes, it runs flawlessly, and building ridiculous potato-with-guns loadouts never gets old. Simple top-down inputs, no controller compromises. You can play for five minutes or two hours and both feel equally good. Also: only 200MB. It barely exists on your storage.
Similar Games
Based on Steam tags

Vampire Survivors
Mow down thousands of night creatures and survive until dawn! Vampire Survivors is a gothic horror casual game with rogue-lite elements, where your choices can allow you to quickly snowball against the hundreds of monsters that get thrown at you. Be the bullet hell!

BALL x PIT
BALL x PIT is a brick-breaking, ball-fusing, base-building survival roguelite. Batter hordes of enemies with ricocheting balls and gather the riches of the pit to expand your homestead, generate resources and recruit unique heroes.