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Undying Flame Demo

About this game

This rogue-lite demo includes Survival mode across the first 4 challenge runs, giving you a full taste of the upgrade system, relic selection, and wave-based progression. Idle mode, Daily Challenge, and the codex/information system are available in the full game. The demo is capped at wave 20.

Full Game Content.

When the fire dies, so do you.

The Last Flame is a top-down wave-survival rogue-lite built around a single idea: keep the campfire burning. Creatures march out of the darkness toward your fire. Shoot them, feed the flame with the wood they drop, and survive long enough to see what the fire becomes.

There is no health bar. The fire tells you everything. A healthy flame is bright, warm, and loud — embers flying, logs crackling. A dying one shrinks, dims to red, and goes quiet. You learn to read it the way you'd read a real fire. Watch the color. Listen to the crackle. Feed it before it's too late.

Two ways to play, one fire to keep alive

  • Survival — Click to shoot. Hover to collect wood. Press F to feed the flame. Fast, tense, skill-based.

  • Idle — Everything automates. You spend coins. The fire burns twice as fast to keep the pressure on. Best for experimenting with absurd relic combinations while enemies scale to your upgrade power instead of wave number.

A deep run, every run

  • 14 upgrades across bullets, fire, and automation — plus 4 prestige upgrades that repeat forever and climb in cost

  • 4 place able structures — Watchtower, Forge, Shrine, and Beacon — each reshaping how your run plays

  • 8 enemy types including stalking Brutes that pause at the dark's edge before charging, Necros that revive nearby corpses, and Shielders that eat your first bullet

  • Boss waves, Deep Night — the dark closes in on you

  • Random events — merchants, storms, ancient blessings, rituals. Choose what you're willing to burn.

90 relics across 7 categories

Every 5 waves, pick 1 of 3. Fire, Bullets, Enemies, Economy, Turrets, Light/Dark, and a Cursed category where bullets teleport, mirror images fire behind you, and the screen goes fully black with auto-aiming plasma. Stacks interact. Runs diverge wildly. You will not see the same build twice.

15 challenges, 11 permanent perks

Beat challenges like Pacifist (fire kills only), Dead Man's Bargain (all upgrades maxed, fire capped at 10%), or Ashen Vow (turrets only) and earn perks that carry into every future run. Your progress sticks.

The fire grows

Every wave you survive, the flame gets a little larger. Early on it's imperceptible. Later, the fire is pushing the darkness back on its own. Survive long enough, and the fire consumes the screen — and the game becomes something else entirely. (A free post-launch expansion is coming.)

Features at a glance

  • Endless wave survival with two full game modes and a challenge system

  • 90 relics, 14 upgrades, 4 prestige tracks, 4 structures, 8 enemy types

  • Procedural visuals and fully synthesized audio — no external assets

  • 20 Steam achievements, cloud saves, Steam Trading Cards

  • Full controller and keyboard/mouse support

  • Built for Windows and Linux

Undying Flame Demo

Survive a minimalist wave-survival rogue-lite. Keep the fire alive. Read its flame. Defend your fire against creatures that crawl from the dark across endless waves. Every wave survived, the fire grows. Over time, it consumes everything.

Developer

Per Sidera Industries

Publisher

Per Sidera Industries

Release Date

04 June, 2026

Platforms