Games like EndlessRain
Games like EndlessRain include Vampire Survivors, Stick It to the Stickman, ShellShock Live, Your Only Move Is HUSTLE, and Skul: The Hero Slayer. We matched them by the tags players give EndlessRain on Steam (Action, Casual, Strategy, 2D Fighter, and Roguelike): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: 2D · Casual · Roguelike

Stick It to the Stickman
Shared: Action · 2D Fighter · Roguelike

ShellShock Live
Shared: Strategy · Action · Casual

Your Only Move Is HUSTLE
Shared: Action · 2D Fighter · Strategy

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

Megabonk
Shared: Roguelike · Action · Indie

Slay the Spire 2
Shared: Roguelike · Strategy · Co-op

One Finger Death Punch
Shared: Action · 2D Fighter · Casual

Death Must Die
Shared: Action · Roguelike · 2D

Pass the Fear
Shared: Action · Strategy · Roguelike

Stick Fight: The Game
Shared: Action · 2D Fighter · Casual

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

Enter the Gungeon
Shared: Roguelike · Action · Indie

Bloons TD 5
Shared: Strategy · Action · Casual

Astro Prospector
Shared: Casual · Roguelike · Strategy

Octogeddon
Shared: Action · Casual · Strategy

Nordic Ashes: Survivors of Ragnarok
Shared: Roguelike · Strategy · Action

UFO 50
Shared: Action · Strategy · 2D

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

Balatro
Shared: Roguelike · Strategy · Casual

Risk of Rain 2
Shared: Action · Roguelike · Co-op

One Finger Death Punch 2
Shared: Action · Casual · Indie

Slots & Daggers
Shared: Casual · Strategy · Roguelike

Bopl Battle
Shared: Action · 2D Fighter · Strategy