Undying Flame

Undying Flame is a top-down wave-survival rogue-lite centred on a campfire. Creatures advance out of the darkness, and the player shoots them, gathers the wood they drop and feeds it to the fire. There is no health bar; the state of the flame communicates the player’s condition, with a healthy fire appearing bright and loud and a failing one shrinking, turning red and falling quiet. A run progresses through three phases, starting at the Fire, moving to the Star and finally collapsing into the Void. The player’s build and relics carry across these phases while enemies, visuals, upgrade options and resources change, with Gold and Wood giving way to Ore and Hydrogen and later Antimatter.

Upgrades are bought from shops that always present three options drawn from seven families: Rapid Shot, Multishot, Explosives, Piercing, Turrets, Hearth and Guard. Each family branches into specialised upgrades and a mastery, and players can lock a card or reroll the shop. Three families can be committed to during the Fire phase, with a random fourth added at the Star and a fifth at the Void, alongside four endless prestige tracks. Every five waves the player picks one of three relics from a pool of 91 across categories including Fire, Bullets, Enemies, Economy, Turrets, Light and Dark, and Cursed. Certain relic pairings reveal ten named synergies, and combining a developed shop build with a matching relic can trigger one of six Ignitions. Players can also place Watchtowers, Forges, Shrines and Beacons. Waves follow a pattern of Swarm, Hunt, Siege and Trial types, with a Climax event every 25 waves, and the game increases enemy numbers when the player survives waves without taking damage.

Four modes are included. Campaign offers the full Fire to Star to Void run along with 14 challenge campaigns that alter rules and grant permanent rewards. The Void is a standalone mode in which shooting is replaced by gravity, with the player dragging orbiting matter into a black hole and spending what it consumes on a 56-node upgrade tree under one of four rulesets. Idle mode relies on automation with enemies scaling to upgrade power, and Daily provides a shared seed with one attempt and a leaderboard. Persistent progression covers Ascension levels A0 to A10, six unlockable classes earned through Ember Trials, 12 additional mantles, 12 fire skins, 30 achievements and archives for relics, synergies, enemies and run history. The game has a 36-track soundtrack that reacts to phase and wave intensity, with an alternative procedural soundtrack, and supports keyboard and mouse, controller, Steam Deck and touch input in 28 languages. There are no microtransactions or adverts, and leaderboard submission is optional.