Lenovo has shipped a version of its Legion Go S handheld that replaces Windows 11 with Valve’s SteamOS, and the transformation is so profound that one reviewer pronounced the original Windows model obsolete. The new $600 SteamOS variant — on sale at Best Buy — turns what was once a competent but occasionally clunky portable into a lean, console-like gaming machine that directly challenges the Steam Deck.
SteamOS, originally exclusive to Valve’s own handheld, is a Linux-based operating system built around a controller-friendly interface. It strips away overhead from background services and apps, leaving a streamlined gaming-first experience. When Valve opened SteamOS to third-party hardware, Lenovo moved quickly, and early adopters are now reaping the benefits. The switch from Windows to SteamOS doesn’t just change the look; it fundamentally alters how the Legion Go S performs, how long it lasts on a charge, and how much it feels like a purpose-built gaming device rather than a miniature PC.
Design and hardware: Familiar chassis, new purpose
Physically, the SteamOS Legion Go S is identical to its Windows sibling, save for a new Nebula purple finish replacing the earlier Glacier White. The handheld retains sculpted grips, textured sides, and a balanced control layout that makes it comfortable for extended sessions. Hall-effect analog sticks promise long-term drift resistance, and programmable rear paddles plus adjustable rear-trigger travel give competitive gamers extra flexibility. At around 1.6 pounds — slightly heavier than the Steam Deck’s 1.4 pounds — it’s still manageable for most users, though fatigue can set in during marathon play.
One notable change is the role of the small right-side touchpad. On Windows models, it doubled as a mouse cursor for navigating the desktop or browsers. Under SteamOS, which intentionally eschews general-purpose apps and web browsing, the touchpad loses that functionality. It can still be mapped to in-game actions or used as a makeshift camera control, but reviewers found it too small for precise aiming in first-person shooters. “I ended up aiming my character in a completely different direction when I meant to shoot the enemy in front of me,” reported ZDNET’s Cesar Cadenas.
The software shift: Why SteamOS changes everything
SteamOS boots directly into a console-like interface built for thumb-and-touch navigation. There’s no desktop layer to manage, no Windows Update prompts, and no antivirus scans competing for resources. This laser focus on gaming is what turns user reactions from “interesting” to “compelling.”
Performance: Real-world gains with sticky asterisks
Multiple hands-on reports confirm that SteamOS extracts measurably higher frame rates and better frame pacing from the same AMD Ryzen Z2 Go processor and Radeon GPU. Lighter Linux overhead plus Proton — Valve’s compatibility layer for running Windows games — deliver a smoother experience. Some benchmarks cited performance boosts up to 75 percent in select titles, but such figures are best-case scenarios. Real-world improvements vary by game engine, resolution, and thermal constraints, yet even modest gains in a handheld class where every frame matters make a tangible difference.
Thermal behavior also improves. The SteamOS stack tends to run quieter and slightly cooler than Windows under equivalent loads, reducing fan noise and helping the device remain comfortable during long sessions.
Usability: No more desktop fiddling
Gone is the need to pair a Bluetooth keyboard or dab at a tiny on-screen keyboard. Menus, game launch flows, and performance controls are optimized for the 8-inch touchscreen and built-in gamepad. Quick-access performance toggles let you adjust CPU/GPU limits on the fly, while per-title profiles — automatically applied based on Valve’s curated settings — eliminate guesswork. For gamers who want a “turn on and play” experience, SteamOS delivers.
Performance in practice: Indie darling, AAA survivor
The Legion Go S configuration pairs the Z2 Go APU with 16GB of RAM and an AMD Radeon GPU. In testing, lightweight indie titles like Hades, Stardew Valley, and Hollow Knight run at a consistently smooth 120Hz, taking full advantage of the display’s high refresh rate. These are the scenarios where the handheld truly shines.
Heavier AAA fare presents a sterner challenge. Monster Hunter Wilds, Cyberpunk 2077, and similarly demanding games force compromises: blurred textures, lower settings, and occasional frame drops. Yet the fact that a handheld can run these titles at all — at acceptable fidelity for its form factor — mirrors the Steam Deck’s achievement. Lenovo’s SteamOS model doesn’t magically leapfrog the Steam Deck in raw horsepower, but it offers a different balance: a larger, faster screen at the cost of OLED color depth.
Display and audio: 120Hz vs. OLED tradeoff
The 8-inch LCD touchscreen with 1920×1200 (WQXGA) resolution runs at 120Hz, prioritizing motion clarity and UI responsiveness. For fast-action games where input timing matters, the higher refresh rate is a meaningful advantage. However, those accustomed to OLED’s deep blacks and vibrant colors will notice the LCD’s less saturated output and slightly lower contrast. This is a deliberate trade: smoothness over saturation. Valve’s Steam Deck OLED, by comparison, caps at 90Hz on a smaller 7.4-inch panel, making it the choice for color connoisseurs.
Audio is adequate—stereo speakers deliver decent clarity, and a 3.5mm jack plus Bluetooth support covers headsets. It’s functional but not groundbreaking.
Battery life and thermals: The physics of portable power
Battery life remains the Achilles’ heel of high-performance handhelds. Running Monster Hunter Wilds, the Legion Go S drained from full to empty in about 1 hour and 15 minutes. Lighter games like Hades 2 stretched that to roughly two hours. SteamOS’s efficiency helps, but physics still rule: pushing an AMD APU at full tilt generates heat and consumes power. Users should plan for charging breaks during extended play sessions, though the dual USB‑C ports make it convenient to top up from a battery pack.
Cooling is competent, and the SteamOS model tends to run quieter than its Windows counterpart, but long AAA marathons will spin the fans audibly.
Controls and gaming feel: Smart additions, one persistent quirk
Hall-effect sticks eliminate the specter of drift, and adjustable trigger toggles add insurance for racing or FPS fans. Programmable rear paddles expand control options without cluttering the front face. Dual USB‑C ports and an accessible microSD slot round out a flexible hardware package.
The right-side touchpad, however, attracts consistent criticism. Intended as a secondary input, it’s too small for precise camera work, making it a poor substitute for a full mouse or larger Steam Deck touchpad. In practice, most gamers will ignore it or assign a low-impact function.
Compatibility: When Proton says no
SteamOS leans on Proton to run Windows games, and compatibility has grown immensely. For a large portion of the Steam catalog, the experience is indistinguishable from Windows—games install and run without a hitch. But edge cases persist. Titles reliant on certain anti-cheat systems (e.g., Destiny 2, Fortnite), proprietary launchers, or middleware may fail to work. Before buying, checking ProtonDB for your must-play games is essential. If you rely on game streaming services, non-Steam launchers, or general-purpose Windows apps, the SteamOS model will feel restrictive.
Price and positioning: $600 contender
At $600 from Best Buy at review time, the SteamOS Legion Go S competes directly with the $549 Steam Deck OLED. For an extra $51, you get a larger 8-inch display with a 120Hz refresh rate versus the Deck’s 7.4-inch 90Hz OLED. The choice hinges on what you value most: smoother motion and screen real estate, or richer colors, larger touchpads, and slightly lighter weight.
Reviewers largely sided with the Legion Go S for its higher refresh rate. “I value higher refresh rates because they ensure smoother animations and faster response times, which can mean the difference between winning and losing,” wrote Cadenas. Gamers who prioritize visual punch and don’t mind the smaller screen may still prefer Valve’s offering.
Who should buy the SteamOS Legion Go S?
This handheld is for gamers who want a dedicated, frictionless portable gaming experience. If your library consists mostly of Steam titles that are Proton-friendly, and you prize smooth motion on a high-refresh screen, the Legion Go S delivers excellent value—especially on sale. It’s also a strong pick for those who found the Windows version too cumbersome and want a console-like feel.
Conversely, if you need guaranteed compatibility with every PC title, regularly use non-Steam launchers (Game Pass, Epic, GOG), or plan to use the device as a mini-PC for productivity, the Windows model — or a different handheld entirely — may be a better fit. Trade-offs in battery life and the small touchpad also mean those seeking all-day AAA gaming or precise FPS controls should look elsewhere.
The Legion Go S with SteamOS is more than a variant; it’s a strategic repositioning that elevates the hardware. By shedding Windows bloat, Lenovo has created a handheld that feels purposeful, responsive, and genuinely competitive with the Steam Deck. For many, it’s the version that should have shipped from the start.