Games like SOLARFLARE
Games like SOLARFLARE include Slay the Spire, Balatro, 9 Kings, Dicey Dungeons, and XCOM 2. We matched them by the tags players give SOLARFLARE on Steam (Auto Battler, Character Customization, Roguelike Deckbuilder, Sci-fi, and Card Battler): closest matches first, and among equally close ones the better-known games.

Slay the Spire
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based

Balatro
Shared: Roguelike Deckbuilder · Singleplayer · Roguelike

9 Kings
Shared: Auto Battler · Roguelike Deckbuilder · RPG

Dicey Dungeons
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based

XCOM 2
Shared: Character Customization · Sci-fi · Strategy

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Card Battler · Dungeon Crawler · Singleplayer

He is Coming
Shared: Auto Battler · Strategy · RPG

Slay the Spire 2
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

Super Fantasy Kingdom
Shared: Auto Battler · RPG · Strategy

Deep Sky Derelicts
Shared: Roguelike Deckbuilder · Card Battler · RPG

Villages & Dungeons
Shared: Auto Battler · Turn-Based · Dungeon Crawler

Wildfrost
Shared: Roguelike Deckbuilder · Card Battler · Singleplayer

Backpack Battles
Shared: Auto Battler · Roguelike Deckbuilder · Strategy

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

XCOM: Enemy Unknown
Shared: Sci-fi · Turn-Based · Singleplayer

Hadean Tactics
Shared: Auto Battler · Roguelike Deckbuilder · Card Battler

STAR WARS Zero Company™
Shared: Sci-fi · Singleplayer · Character Customization

Banners of Ruin
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based

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

XCOM®: Chimera Squad
Shared: Singleplayer · Sci-fi · Turn-Based

Yao-Guai Hunter
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based

Griftlands
Shared: Card Battler · Turn-Based · RPG

The Bazaar
Shared: Auto Battler · Card Battler · Strategy

Guild of Dungeoneering Ultimate Edition
Shared: Roguelike Deckbuilder · Turn-Based · RPG