SYSCALL: RING ZERO

SYSCALL: RING ZERO

Chilling Moose Games · July 3, 2026 · Programming, Logic, 1990's, Hacking, Strategy

Buy the SYSCALL: RING ZERO key for Steam from CJS CD Keys at $2.76 — the cheapest of 2 stores we compare.

PC
2 user reviews100% · 2
Best price 75 Lowest tracked
$2.76-79%
⭐ lowest tracked
CJS CD Keys Buy at CJS CD Keys

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Where to buy SYSCALL: RING ZERO — official stores

Steam
Steam
Standard Edition · Steam
$12.99
Buy

Cheapest SYSCALL: RING ZERO 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.

CJS CD Keys
CJS CD Keys
Standard Edition · Steam
$2.76
Buy

SYSCALL: RING ZERO price by region

SYSCALL: RING ZERO costs £1.26 in the United Kingdom, €1.45 in Europe (EUR), $2.76 in the United States, $2.76 in Georgia (USD), zł8.09 in Poland, CA$15.75 in Canada, A$17.95 in Australia, NZ$20.25 in New Zealand and R$47.99 in Brazil right now.

Cheapest SYSCALL: RING ZERO offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
United Kingdom £1.26 −90% £12.99 £1.26 3
Europe (EUR) €1.45 −89% €12.99 €1.45 2
United Statesyour region $2.76 −79% $12.99 $2.76 2
Georgia (USD) $2.76 −63% $7.49 $2.76 2
Poland zł8.09 −85% zł55.49 zł8.09 2
Canada CA$15.75 CA$15.75 — 1
Australia A$17.95 A$17.95 — 1
New Zealand NZ$20.25 NZ$20.25 — 1
Brazil R$47.99 R$47.99 — 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 SYSCALL: RING ZERO

Reverse-engineer a private 1990s BBS. Read disassembly, patch broken checks, optimize a nine-core rack, and write assembly firmware that locks onto live scope traces. With 200+ puzzles, full controller support and offline play, you can refine your assembly skills on all your devices!

SYSCALL: RING ZERO — game info

Platforms
Windows, macOS, Linux / SteamOS
Player modes
Single-player
Controller
Full controller support
PC Game Pass
Not included

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Sep 12, 2026
A fantastic collection of assembly language puzzles varying from replicating a data pattern ("scope"), reversing a password via reading algorithm code ("crack"), fixing code ("patch"), and writing your own code across multiple blocks & inputs to satisfy expected outputs ("worm"). It throws you right in, which can be disorienting at first. But, it has in-game documentation (and optional hints) to assist you with how the game and assembly coding works, once you figure out what it's trying to say (it reads like it's poorly translated, and I have no idea if that's intentional). Having a basic understanding of binary, assembly and/or programming in general definitely helps a lot! Despite that, I feel like this game is incredibly overlooked (seriously, how am I the first review?!). Once I got into it, I found it quite satisfying to solve the puzzles and move across the nodes. As of writing, I'm still going through the beginner puzzles (some of which are stupidly easy once you know how to play), but there's 200 or so puzzles so I'm looking forward to the challenges that await! [b]Also the entirety of this game is a single EXE that fits within 19 MB. That alone should tell you this game…
7 found this helpful
Recommended Sep 13, 2026
the game size is too big

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