
Stack ridiculous power-ups infinitely in this retro-inspired FPS Bullet Heaven. Build completely broken combinations as you go from a lowly demon hunter to an unstoppable demon-slaying GOD. Includes Story Mode with multiple endings and Endless Mode.
Modeled estimate, not a reported figure. How we estimate →
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 0.14/day in the week to Sep 8 → 0/day in the week after.
Reviews, worldwide (the counter carries no country): 0/day in the week to Aug 21 → 0/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 25 chart moves that followed a price cut of more than 20% went a median of 10 places towards #1, and the 2,413 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
About
NOTICE
Steam Deck/Linux Compatibility: Performance on Steam Deck or Linux devices may crash or vary.
No AI Assets: No AI-generated assets were used in this game.
ABOUT THIS CRAZY JANKY ASS GAME
DEMON SIEGE is a fast-paced, retro-inspired FPS Bullet Heaven built by a solo developer with a dark sense of humor in the old-school Easy FPS Editor engine.
Designed for raw arcade action, DEMON SIEGE blends boomer shooter movement with infinite roguelite stacking. Fight demonic hordes, earn gold, buy vending machine upgrades, and break the game with absurd builds. Fire walls of bullets, leap across the map, run so fast the floor catches literal fire, and become an unstoppable god.
Includes a short, sweet Story Mode with multiple endings. Don't expect anything Oscar-worthy, but it has plenty of stupid charm.
KEY FEATURES
Dark & Stupid Humor: Crude, stupid fast-paced, and unhinged arcade attitude.
Infinitely Stacking Perks: All upgrades carry over between levels and stack without limits.
Fast Arcade Combat: High-speed movement and classic boomer shooter gunplay.
Multiple Endings: A tight 30-minute campaign with distinct Good and Bad endings.
Endless Mode: Battle forever, scale infinitely, and see how long you can survive.
Single-Session Runs: True arcade-style structure meant to be cleared in one sitting.
Vending Machine Shops: Spend gold between rounds on guns, skills, health, and ammo.
Killstreak Announcer: Chain kills together for score multipliers and extra gold payouts.
Original Soundtrack: Features a blood-pumping album composed by MIEP.
If you're looking for a cinematic AAA shooter, this isn't it. If you love wild indie experimentation, retro FPS action, and becoming ridiculously overpowered, DEMON SIEGE is your ticket.
Start with Story Mode, then test your limits in Endless Mode. Wishlist, join our Discord, or buy DEMON SIEGE today! Please leave a review.. It helps a solo dev tremendously!
Reviews
I had fun with it Simple retro shooter with simple mechanics. Its a low budget Doom copy as far as story and premise, but thats fine by me. Knife is probably the best weapon. I was streaming my live review and singing about stabbing demons. It was great. Worth it for a couple hours of fun I think
game is fun
I've been playing DEMON SIEGE for a bit and it's a solid retro FPS. Fast movement, waves of demons, that old-school gunplay feel. It's fun. What I appreciate most is the developer. Groovy is clearly paying attention. Feedback gets a response, updates come out regularly, and you can tell this is a solo dev who actually cares about making the game better over time. One thing I'd love to see improved is the mechanical feedback. Hits, kills, and impacts could use a bit more punch to really sell the action. It's a small thing though, and honestly the game is already heading in the right direction on that front. For 3 bucks this is easy to recommend if you like supporting devs who keep showing up for their players.
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Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English**languages with full audio support
Great fun game, can be played in an hour. worth the time if you want something different. was not expecting this from basically the old Wolfenstien engine
Fun and very addictive little shooter, its an assault on the senses but it does all come together and work! Has a great levelling up system so your always getting more powerful in some way, voice lines made me laugh! Finished it in one sitting, but looking forward to trying out the endless mode.
The combat is fun. The leveling system gives you a sense of increasing power over time, especially if you stay near the vending machine and buy levels as fast as you can pile up 20 moneyunits or gold or whatever. A simple blow the hell out of everything affair that is fun while it lasts. Worth the three bones.
I like the UI design a lot, and I’m having loads of fun with the gameplay. I can’t even find adequate words to describe how tough this game is. When I first played it, it was very much a “you gotta be on the look out” kind of game. Since enemies can spawn almost anywhere, you’re never really safe. I love the shotgun and SMG. The flamethrower is also amazing in city. There is a point where you can have almost all your enemies squeezed between two stop signs, and it seems like your only option is to blast them with flamethrower. Watching everything be overwhelmed was very satisfying. It’s a very easy looking game but there is a ton to be enjoyed here. If you enjoy fast paced shooters where you have to be on your toes and constantly adapt to situations, I’d highly recommend giving DEMON SIEGE a spin.
This game is utterly ridiculous and I mean that in a good way. not before long you become a fast moving, high jumping, op demon slayer with a bunch of corny jokes put in for laughs. good way to kill an hour.
As a growing EFPSE developer myself, I love seeing what is possible in-engine, and the creative ways people go about pushing it. This is a lovely entry into the EFPSE library with great personality! Highly recommend! At $Cheap.99 it's an easy pick-up for anyone looking for a good time racking up combos & shooting monsters! Shout out Groovy Gory!
Fast, chaotic, and dripping with retro atmosphere, demon siege is the kind of game that grabs you from the first few minutes and doesn't let go. The unsettling art style and enemy designs pull you into a genuinely strange, arcade-fueled mood that few shooters manage to nail. Watching yourself go from struggling against the demon hordes to completely dominating them is one of the best power curves I've felt in a bullet heaven FPS. If you love old-school shooters with a wild, experimental edge, this one's an easy recommend.
Selling now
See how fast this game is selling right now — estimated copies and revenue per day from recent review growth.
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