Games like Sengodai
Games like Sengodai include Slay the Spire, Balatro, Slay the Spire 2, Monster Train, and 9 Kings. We matched them by the tags players give Sengodai on Steam (Roguelike Deckbuilder, Strategy, Creature Collector, RPG, and Card Battler): closest matches first, and among equally close ones the better-known games.

Slay the Spire
Shared: Roguelike Deckbuilder · Card Battler · Strategy

Balatro
Shared: Roguelike Deckbuilder · Strategy · Roguelike

Slay the Spire 2
Shared: Strategy · Roguelike Deckbuilder · Roguelike

Monster Train
Shared: Card Battler · Deckbuilding · Card Game

9 Kings
Shared: Strategy · RPG · Roguelike Deckbuilder

Monster Train 2
Shared: Roguelike Deckbuilder · Strategy · Roguelike

Dicey Dungeons
Shared: Roguelike Deckbuilder · Card Battler · Strategy

Gordian Quest
Shared: RPG · Strategy · Card Battler

Dungeons & Degenerate Gamblers
Shared: Roguelike Deckbuilder · Strategy · Roguelike

Wildfrost
Shared: Roguelike Deckbuilder · Card Battler · Card Game

Across the Obelisk
Shared: Roguelike Deckbuilder · Roguelike · Card Battler

As We Descend
Shared: Roguelike Deckbuilder · Card Battler · Roguelike

Die in the Dungeon
Shared: Strategy · Roguelike Deckbuilder · Roguelike

Griftlands
Shared: Card Battler · RPG · Deckbuilding

Decktamer
Shared: Roguelike Deckbuilder · Creature Collector · Card Battler

Super Fantasy Kingdom
Shared: Strategy · RPG · Roguelike

Touhou: Lost Branch of Legend
Shared: Roguelike Deckbuilder · Strategy · Card Battler

Roguebook
Shared: RPG · Strategy · Deckbuilding

Chrono Ark
Shared: Roguelike Deckbuilder · Strategy · RPG

DICEOMANCER
Shared: Strategy · Roguelike Deckbuilder · Card Battler

Inscryption
Shared: Card Battler · Card Game · Deckbuilding

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Card Battler · Strategy · Roguelike

Vault of the Void
Shared: Roguelike Deckbuilder · Strategy · Card Battler

Astrea: Six-Sided Oracles
Shared: Roguelike Deckbuilder · Card Battler · Strategy