

Homebrew - Patent Unknown
Copybugpaste · November 15, 2014 · Automobile Sim, Driving, Racing, Transportation, Programming
Buy the Homebrew - Patent Unknown key for Steam from Gameseal at $0.74 — the cheapest of 7 stores we compare.
Where to buy Homebrew - Patent Unknown — official stores
Cheapest Homebrew - Patent Unknown keys — keyshops
Keyshops are third-party marketplaces — keys are resold and can be region-locked or a different edition. Check the listing's region & edition before buying.
Some store links are affiliate links — playze may earn a commission at no extra cost to you. It never changes the price you pay, and the cheapest confirmed price is always shown in the Best price box above.
Homebrew - Patent Unknown price by region
Homebrew - Patent Unknown costs £0.62 in the United Kingdom, €0.65 in Europe (EUR), $0.74 in the United States, $0.74 in Georgia (USD), zł3.68 in Poland, R$5.15 in Brazil, CA$17.49 in Canada, A$21.50 in Australia and NZ$21.99 in New Zealand right now.
| Region | Best price | Official store | Key shop | Stores |
|---|---|---|---|---|
| £0.62 −95% | £11.39 | £0.62 | 5 | |
| €0.65 −95% | €12.49 | €0.65 | 6 | |
| $0.74 −95% | $14.99 | $0.74 | 7 | |
| $0.74 −91% | $8.49 | $0.74 | 6 | |
| zł3.68 −95% | zł67.99 | zł3.68 | 3 | |
| R$5.15 −89% | R$46.99 | R$5.15 | 2 | |
| CA$17.49 | CA$17.49 | — | 2 | |
| A$21.50 | A$21.50 | — | 2 | |
| NZ$21.99 | NZ$21.99 | — | 1 |
Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.
Screenshots
About Homebrew - Patent Unknown
Build and test wild custom vehicles from cars to planes to boats with deep physics simulation including aerodynamics and water dynamics across a massive open world. Push creativity to its limits using logic components to engineer autopilot systems, transformers, and robotic contraptions that go way beyond standard vehicle parts.
Unleash your creativity and craft anything from flying cars to jet-powered toilets. Fair warning: there's a learning curve. But once you've got it, the sky's the limit for your creations! While active development is paused, we focus preserving the game and keeping it accessible.
Homebrew - Patent Unknown — game info
- Platforms
- Windows
- Player modes
- Single-player, Online PvP
- Controller
- Partial controller support
- PC Game Pass
- Not included
What Steam players say
Recent verbatim reviews from Steam — separate from playze.io community reviews below.
Homebrew - Patent Unknown is an abandoned vehicle building game that players appreciate for its unique engineering-focused gameplay and creative building system, though it suffers from a mandatory, lengthy tutorial that some find frustrating and an unpolished, unrefined state due to development stopping mid-overhaul. The game resonates most with players willing to accept its rough condition and who enjoy open-ended problem-solving, though performance issues and lack of ongoing support are notable drawbacks.
Abandonware5 found this helpful
While it's sad the devs haven't been able to put out an update to this in so long, it still hits a spot other vehicle building games just haven't been able to hit for me. If you're happy to accept it as it is rather than expecting a super polished experience (which is a rare occurrence with this kind of game to begin with) I'd definitely still recommend it. Personally, I think the main area it suffers is that they put out an overhaul to the vehicle building right before development stopped, not giving much time for the new system to be refined. It would've been nice if the old version was made available through Steam once they realised they weren't going to be able to work on the new system.
The game locks you into a Time Delayed Tutorial system, you have to do the training before your allowed to play the game. That is just work, I wanted to figure it out myself, but with no way to skip the tutorial I just gave up. I am not willing to waste an hour of my life to sit through 50 slides on how to play a game I just wanted to get into. Returned the game for a refund.
I have a good joke for you guys. What's more irritating than an abandoned open-world engineering game?
very cool, god building system and logic stuff, works well on my laptop even if it stops responding sometimes in the builder
This game holds a special place in my heart. I remember as a kid seeing one of the earliest forms of this game from the youtuber Shake Bake. I was blown away by the concept and stuck with it on and off throughout the years. It was the first game that really challenged me to work out how to solve an engineering problem to achieve a goal I set for myself. It pains me that looking at steamdb I am one of only 2 players to log into this game in the last couple days. The community this game held was so great, always willing to help others and loving to see other people's inventions. I hope either this game or a new one grows a nice little community again and sparks that same sense of invention like this did all those years ago.
Community reviews
0 reviews
Sign in to write a review.
No reviews yet. Be the first to review this game.
More like Homebrew - Patent Unknown
News
PCGames like Borderlands 3: guns that roll, trees that branch
Games like Borderlands 3 have to do two things at once: roll a new gun every few minutes and make a skill tree worth planning. These manage both, and one asks you to craft instead.
Nov 6, 2026
PCGames like Dragon Age 2: one city, ten years, three acts
Games like Dragon Age 2 are hard to find because almost no RPG keeps you in one city while it rots. These come close, from Neketaka to the streets of Serene.
Nov 6, 2026
PCGames like Remember Me, for the memory remix more than the city
Games like Remember Me, picked for the Memory Remix rather than the neon: minds you can break into, a vertical city to climb, and combos you build yourself.
Nov 5, 2026
PCGames like Noita, where the physics is the real enemy
Games like Noita for the two things it really does: spells you assemble yourself, and a simulated world that takes nobody's side. Seven picks, from a slugcat to a dwarf fortress.
Nov 5, 2026
PCNo Rest for the Wicked price: buy in Early Access, or wait?
No Rest for the Wicked price: Moon Studios says it goes to $60 at 1.0 in March 2027. Our record shows one discount window since late September, bottoming at $25.44 on 15 October.
Nov 5, 2026
FreebiesFlotsam free on Epic: claim the garbage-sea builder by 12 Nov
Flotsam free on Epic until 12 November. The cheapest we had logged it at since late September was $10.45 on 15 October, and the market had moved back up before this offer opened.
Nov 5, 2026
PCGames like Clair Obscur Expedition 33 that keep you in the fight
Games like Clair Obscur Expedition 33, sorted by how much each one asks of your hands, from timed inputs on every action to turns won purely on preparation.
Nov 4, 2026
PCGames like Subnautica, where the map opens when you earn it
Games like Subnautica that keep the depth gate: a wall you cannot pass, a workbench, and more map opening only once the equipment does.
Nov 4, 2026
PCTekken 8 ღირს თუ არა: 91 ქულა და შერეული შეფასება
Tekken 8 ღირს თუ არა, როცა კრიტიკოსებს 91 ქულა აქვთ დაწერილი, მოთამაშეებს კი „შერეული"? ფასი, ონლაინის მდგომარეობა და უკეთესი ალტერნატივა.
Sep 24, 2026
DealsStellaris იაფად: ოცდახუთი დამატება და ერთი გამოსავალი
Stellaris იაფად ყიდვა საბაზისო თამაშის შემთხვევაში მარტივია. ძვირი დამატებებია — და მათთვის არსებობს ვარიანტი, რომელსაც ბევრი ვერ ამჩნევს.
Sep 24, 2026
PCARK ფასი: Evolved თუ Ascended — რომელი ვიყიდოთ
ARK ფასი ორი სხვადასხვა თამაშის ფასია. რომელი ჯობია ქართული სიიდან, სად არიან მოთამაშეები და რატომ არ ღირს ახალ ვერსიაზე გადახტომა.
Sep 24, 2026
DealsCivilization 6 იაფად: რომელი დამატება ღირს მართლა
Civilization 6 იაფად ყიდვა მარტივია — საბაზისო თამაში იაფია და იაფად რჩება. რთული ის არის, რომ ცხრამეტი დამატებიდან სწორი აირჩიოთ.
Sep 24, 2026
FreebiesCS2 უფასოდ: რა ღირს სინამდვილეში Prime
CS2 უფასოდ ითამაშება საქართველოდანაც და ეს დემო არაა. ფული მხოლოდ Prime-ს სჭირდება — აი, რას იძლევა ის და ვის ღირს.
Sep 24, 2026
PCCuphead ღირს თუ არა: სირთულე, DLC და ორზე თამაში
Cuphead ღირს თუ არა: ექვსივე ქართულ მაღაზიაში ერთი ფასია, მეგობარს კი ასლი საერთოდ არ სჭირდება. სირთულე, ერთადერთი დამატება და როდის ვიყიდოთ.
Sep 23, 2026
DealsRimWorld იაფად: ბაზა, ხუთი დამატება და სწორი რიგი
RimWorld იაფად ყიდვა დამატებების რიგზეა დამოკიდებული, არა ფასდაკლების ლოდინზე. რომელი ხუთიდან ღირს ჯერ და რომელ მაღაზიას აქვს ფასდაკლება.
Sep 23, 2026
PCPhasmophobia ფასი: ოთხი ასლი და ერთი მაღაზია
Phasmophobia ფასი ქართულ სიაში მხოლოდ ერთ მაღაზიაში ჩანს, თამაში კი ოთხზეა გათვლილი. რატომ ღირს ფასდაკლების დალოდება და რა გჭირდებათ დასაწყებად.
Sep 23, 2026New releases
All new releases →- AION 2Sep 30, 2026Free
- Onimusha: Way of the SwordSep 25, 2026$38.41
- AniimoSep 16, 2026Free
- WARDOGSSep 10, 2026$32.06
- The Blood of DawnwalkerSep 2, 2026$58.58
- STAR WARS Zero Company™Aug 27, 2026$44.74
- How to FishAug 20, 2026$7.36
- Mortal Shell IIAug 20, 2026$49.99
- Hell Let Loose: VietnamAug 13, 2026$30.43
- Servant of the LakeAug 13, 2026$5.35
- TUNGAug 7, 2026Free
- Corsair CoveJul 31, 2026$21.48
- The NOexistenceN of LilithJul 16, 2026$1.99
- Crushed In TimeJun 10, 2026$19.99
- Arms of GodJun 8, 2026$11.50
- ParalivesMay 25, 2026$39.99
- MeltopiaMay 1, 2026$3.67
- Life is Strange: ReunionMar 26, 2026$31.24
- Starship Troopers: Ultimate Bug War!Mar 16, 2026$11.39
- ROMEO IS A DEAD MANFeb 10, 2026$49.99
- CairnJan 29, 2026$14.74
- Yakuza KiwamiDec 11, 2025$10.99
- Drifter Star: EvolutionDec 10, 2025$1.77
- The Perfect Tower IINov 30, 2025Free
Top games right now
All rankings →- 1Counter-Strike 2Free
- 2Dota 2Free
- 3PUBG: BATTLEGROUNDSFree
- 4Grand Theft Auto V Legacy—
- 5Terraria$2.16
- 6Tom Clancy's Rainbow Six SiegeFree
- 7Rust$19.99
- 8Garry's Mod$5.00
- 9Team Fortress 2Free
- 10Black Myth: Wukong$36.53
- 11HELLDIVERS™ 2$23.99
- 12ELDEN RING$38.88
- 13Apex Legends™Free
- 14Left 4 Dead 2$9.99
- 15Stardew Valley$13.79
- 16Wallpaper Engine$3.99
- 17Cyberpunk 2077$23.91
- 18Euro Truck Simulator 2$9.69
- 19Dead by Daylight$6.76
- 20Red Dead Redemption 2$13.39
- 21The Witcher 3: Wild Hunt$18.57
- 22Baldur's Gate 3$56.12
- 23Phasmophobia$13.65
- 24War ThunderFree
Buy at Gameseal 














