Lenovo’s decision to strip Windows from its Legion Go S handheld and instead ship with SteamOS transforms a competent but forgettable PC into one of the most compelling handheld gaming devices on the market. This isn’t just a software swap; it’s a philosophical pivot that redefines what a portable PC gaming machine should be. I swapped my own PC for this device, and after weeks of testing, I don’t miss Windows at all.

SteamOS, originally an exclusive to Valve’s Steam Deck, is a lightweight, Linux-based operating system designed from the ground up for gaming. By licensing it to third-party manufacturers, Valve has opened the door for hardware partners like Lenovo to build devices that shed the bloat and overhead of a general-purpose operating system. The Legion Go S is one of the first to take advantage of this shift, and the result is a handheld that feels less like a shrunken laptop and more like a dedicated console.

The hardware remains identical to the earlier Windows model, but the experience is night and day. The 8-inch LCD touchscreen now runs at a fluid 120Hz, a spec that truly shines when you’re playing fast-paced indies or twitchy shooters. Under the hood, an AMD Ryzen Z2 Go processor, integrated Radeon graphics, and 16GB of RAM handle most titles with surprising grace. But it’s the software that elevates this from a “just okay” device to a great one.

A Familiar Design, Refined for Play

At first glance, the Legion Go S looks like the Windows version, save for the new Nebula purple color. It weighs 1.62 pounds—heavier than the Steam Deck’s 1.4 pounds—but the ergonomics are superbly balanced. Textured grips prevent slipping during long sessions, and the overall sculpting feels natural in the hands. Lenovo has clearly taken feedback from earlier models. Hall-effect analog sticks promise drift resistance, and rear switches let you tune trigger travel distance. The physical controls are a win.

But the right touchpad, a tiny square beneath the right stick, is a casualty of the OS change. In the Windows world, it served as a cursor controller for desktop navigation. On SteamOS, where there’s no desktop to speak of and no web browser, its utility evaporates. You can map it to in-game functions, but as an aiming tool it’s too small for precision. More often than not, it sends your crosshair spiraling in the wrong direction. Lenovo kept the pad for consistency, but it’s a legacy appendage on this Steam-first device.

Performance That Punches Above Its Weight

Handheld gaming is a delicate dance between performance, thermals, and battery life. The Legion Go S manages this with an AMD Ryzen Z2 Go and 16GB of RAM. It’s not a powerhouse, but it’s far from underpowered. Lightweight titles like Hades, Stardew Valley, or Dead Cells sing at a buttery 120Hz, making full use of the high-refresh display. These are the games that make you fall in love with the form factor.

AAA games are another story. Monster Hunter Wilds runs, but with blurry textures and frame drops during intense scenes. That’s not a flaw specific to this device; even the Steam Deck struggles with such titles. They are playable if you’re willing to dial down settings, but the experience is compromised. The silver lining is SteamOS’s per-game performance profiles. A tap on the lightning bolt icon opens a menu where you can apply a pre-configured setting that balances framerate and visual fidelity. You don’t need to spend half an hour tweaking sliders—one click and you’re optimized. For tinkerers, manual TDP limits and framerate caps are also available, but the default profiles are remarkably effective.

Thermal throttling is real, especially in prolonged AAA sessions. The chassis gets warm, and fans spin up audibly. Sustained performance on heavy titles will dip, but that’s the nature of compact gaming hardware. For most users, the smart move is to stick to indie and mid-tier games, where the Legion Go S truly excels.

The SteamOS Advantage: A Console-Like UI Without the Windows Bloat

SteamOS turns the Legion Go S into a focused gaming appliance. Boot it up, and you’re greeted by the Steam interface—no desktop, no Start menu, no background services hogging resources. This streamlined environment frees up CPU and GPU headroom for games, and the result is snappier load times and more responsive menu navigation. The console-like UI is intuitive; everything you need is a few button presses away.

Game compatibility relies on Proton, Valve’s compatibility layer that allows Windows games to run on Linux. The library is vast and growing, but it’s not universal. Many popular titles work flawlessly. Some, particularly those with aggressive anti-cheat systems or niche middleware, may refuse to launch or perform erratically. Before buying, it’s wise to check ProtonDB for your must-play games. For me, the vast majority of my Steam library ran without issue, and I quickly forgot I wasn’t on Windows.

What’s notably absent: a web browser, productivity apps, or any real desktop environment. This is not a laptop replacement. If your routine involves Alt-Tabbing to Discord, watching YouTube, or firing up Excel, you’ll miss Windows. But if your goal is to play games and only play games, the trade-off is liberating. The Legion Go S becomes a device that respects your attention, eliminating the temptation to multitask.

Battery Life: The Achilles’ Heel

No handheld with this much power can escape the battery curse. Pushing Monster Hunter Wilds drained the Legion Go S in about an hour and 15 minutes. Lighter games like Hades 2 stretched that to two hours. These numbers are modest, but they’re consistent with competitors. Valve’s Steam Deck OLED ekes out a bit more endurance thanks to its more efficient panel, but neither device will let you play a cross-country flight without a charger.

Fast charging support helps, and a compact 65W power bank becomes an essential accessory. Lenovo hasn’t performed miracles here—physics simply won’t allow it. The battery life is what it is, and you’ll need to plan around it.

Legion Go S vs. Steam Deck: A Head-to-Head

With the Legion Go S now running SteamOS, it’s a direct rival to the Steam Deck. The comparison breaks down along display, controls, and price.

Display

  • Legion Go S: 8-inch LCD, 120Hz refresh rate. The higher refresh means smoother motion and snappier response times—crucial in competitive games. But it’s an LCD, so blacks aren’t as deep, and colors lack the pop of OLED.
  • Steam Deck OLED: 7.4-inch OLED, 90Hz. The colors are richer, contrast is stunning, and HDR support adds visual oomph. The 90Hz limit is less fluid but still very playable.

Your choice here comes down to whether you prize refresh rate or visual fidelity. I found the 120Hz panel made platformers and shooters feel incredibly responsive, and I didn’t miss the deeper blacks during fast action. In dark, atmospheric games, the Steam Deck’s OLED has an obvious edge.

Controls

  • The Steam Deck’s large, square trackpads are genuinely useful for aiming in first-person games, navigating desktop mode, or playing pointer-based genres. The Legion Go S’s tiny pad is a toy by comparison. For shooter fans, the Deck has a clear advantage. Otherwise, both devices offer comfortable thumbsticks, responsive buttons, and rear paddles. Lenovo’s trigger switches are a nice touch, letting you adjust the travel on the fly.

Weight and Portability

  • The Legion Go S is heavier at 1.62 pounds vs. the Deck’s 1.4 pounds. It’s not a huge difference, but during extended play, the Deck’s lighter build is noticeable. Both are portable, but neither slips into a pocket.

Price

  • At $600 (on sale at Best Buy), the Legion Go S undercuts the mid-range Steam Deck configurations and directly challenges the $549 OLED model. For an extra $50, you get a larger, higher-refresh display and Lenovo’s ergonomic design. The value proposition is strong, especially if you favor performance over OLED richness.

Who Should Stick with Windows?

Lenovo still sells a Windows 11 version of the Legion Go S, and it’s not without merit. If your gaming library relies heavily on Game Pass, anti-cheat-heavy titles (Valorant, Fortnite, Destiny 2), or you need a portable device that can double as a light workstation, Windows remains the safer choice. The Windows model is more versatile but also more clunky, with a desktop OS that wasn’t designed for small touchscreens. For pure Steam gamers, the SteamOS version is the obvious pick.

Tips for Getting the Most Out of Your Legion Go S

  • Use per-game profiles first. Start with the Steam-provided default; tweak only if you need longer battery or smoother frames.
  • Cap framerate at 60fps for AAA titles. You’ll lose the 120Hz smoothness but gain significant battery life and thermal headroom.
  • Lower graphical presets to medium or low on demanding games. Shadows and reflections are the first knobs to turn.
  • Carry a power bank. A 65W USB-C PD charger is non-negotiable for travel.
  • Map the touchpad to non-aim functions. Use it for quick weapon swaps, menus, or as a radial menu instead of a finicky aiming tool.
  • Play in cooler environments. High ambient temperatures accelerate throttling; a desk fan can help if you’re stationary.

The Bigger Picture: What Valve’s SteamOS Licensing Means

The Legion Go S isn’t just a product—it’s a proof of concept. Valve’s willingness to license SteamOS to third parties signals a future where multiple manufacturers compete on hardware while sharing a common, optimized software platform. This could lead to a wave of handhelds with diverse form factors, screen technologies, and control schemes, all running the same lean gaming OS. It also places pressure on Microsoft to improve Windows for handhelds, perhaps with a dedicated gaming mode or a stripped-down Xbox OS variant.

For consumers, the benefits are clear: more choice, better software optimization, and a healthier ecosystem. The risk is fragmentation. If each OEM implements SteamOS differently—with varying driver quality, firmware updates, or hardware quirks—the experience could become inconsistent. Valve will need to enforce tight standards to ensure the “just works” promise remains intact.

Verdict: A Gaming-First Handheld That Finally Makes Sense

The Lenovo Legion Go S (SteamOS) is a revelation. It takes solid hardware and frees it from the shackles of a desktop OS, resulting in a device that is faster, simpler, and more joyful to use. It doesn’t pretend to be a PC replacement, and that honesty is its greatest strength. If you live inside Steam and crave a high-refresh, portable gaming experience, this $600 handheld delivers. Battery life and the anemic touchpad are real compromises, but they pale next to the sheer pleasure of a dedicated gaming appliance that just works.

For the first time, the Steam Deck has a genuine rival—one that matches its software polish and outshines it in key areas. The Legion Go S is proof that leaving Windows behind isn’t a loss; it’s an upgrade.