Games like Afloat
Games like Afloat include Vampire Survivors, The Binding of Isaac: Rebirth, Megabonk, Skul: The Hero Slayer, and Hades. We matched them by the tags players give Afloat on Steam (Indie, Action Roguelike, Roguelike, Replay Value, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Indie

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Indie · Roguelike

Megabonk
Shared: Action Roguelike · Roguelike · Indie

Skul: The Hero Slayer
Shared: Indie · Action Roguelike · Roguelike

Hades
Shared: Action Roguelike · Indie · Roguelike

The Binding of Isaac
Shared: Action Roguelike · Indie · Roguelike

Enter the Gungeon
Shared: Action Roguelike · Roguelike · Bullet Hell

Dead Cells
Shared: Roguelike · Action Roguelike · Replay Value

Brotato
Shared: Roguelike · Action Roguelike · Bullet Hell

Nuclear Throne
Shared: Action Roguelike · Roguelike · Indie

Spelunky
Shared: Action Roguelike · Roguelike · Indie

Rogue Legacy
Shared: Indie · Roguelike · Action Roguelike

Risk of Rain (2013)
Shared: Action Roguelike · Indie · Roguelike

Dungreed
Shared: Action Roguelike · Roguelike · Indie

Halls of Torment
Shared: Action Roguelike · Bullet Hell · Roguelike

ScourgeBringer
Shared: Indie · Action Roguelike · Action

Death Must Die
Shared: Action Roguelike · Bullet Hell · Roguelite

Tiny Rogues
Shared: Action Roguelike · Replay Value · Bullet Hell

BALL x PIT
Shared: Roguelike · Action Roguelike · Action

Noita
Shared: Roguelike · Indie · Action Roguelike

Neon Abyss
Shared: Roguelike · Replay Value · Platformer

Downwell
Shared: Action Roguelike · Indie · 2D Platformer

Ravenswatch
Shared: Roguelike · Action Roguelike · Indie

Balatro
Shared: Roguelike · Replay Value · Indie