ROG Ally vs Legion Go vs Steam Deck Compared
Three very different takes on the handheld gaming PC: ASUS's Windows-powered ROG Ally, Lenovo's modular Legion Go, and Valve's SteamOS-based Steam Deck. Here's how they actually differ where it counts.
Screen and controls
The Steam Deck has the smallest, lowest-resolution screen of the three (7 inches), but Valve compensates with the best-in-class trackpads for games designed around a mouse cursor, plus back grip buttons that the others don't match as well. The ROG Ally has a larger, sharper 7-inch panel with a higher refresh rate, aimed squarely at making games look and feel snappier, but its control layout is a fairly conventional gamepad. The Legion Go goes biggest at 8.8 inches with detachable controllers (similar in concept to a Switch), which makes it the heaviest and bulkiest of the three but also the most flexible — you can prop the screen up and use the controllers separately.
Size and weight at a glance
Steam Deck: smallest and most pocketable of the three, best ergonomics for long sessions. ROG Ally: middle ground, light for its screen size. Legion Go: largest and heaviest, but the detachable controllers add versatility nothing else here offers.
Battery life reality
All three suffer the same fundamental problem: modern AAA games at reasonable settings will drain any of them in roughly 1.5-2.5 hours of demanding play. Less intensive indie games or older titles stretch that out considerably, sometimes to 4+ hours. The Steam Deck tends to hold a slight edge in efficiency for Linux-native and well-optimised titles thanks to SteamOS's lighter overhead compared to full Windows running in the background on the ROG Ally and Legion Go. If battery life matters more than raw performance to you, don't expect any of these three to comfortably last a long flight on full settings — plan around charging opportunities.
Game library access — the biggest practical difference
This is where the three genuinely diverge. The Steam Deck runs SteamOS, a Linux-based system, so it plays Steam library games natively (checked against Valve's compatibility ratings) but installing other storefronts like the Epic Games Store or Battle.net requires extra setup through a desktop mode, and some anti-cheat protected multiplayer games simply won't run at all. The ROG Ally and Legion Go both run full Windows, meaning they can install and run Steam, Epic, GOG, Battle.net, Xbox Game Pass and basically any PC game or launcher without workarounds — at the cost of Windows' background overhead eating into battery life and occasionally interrupting play with updates.
- Steam Deck: best if your library is mostly Steam games and you want the smoothest, most console-like experience out of the box.
- ROG Ally: best if you want maximum compatibility with any PC storefront or multiplayer anti-cheat game, and don't mind Windows quirks.
- Legion Go: best if you want Windows-level compatibility plus the most flexible physical form factor.
Who each one actually suits
Pick the Steam Deck if you mainly play from your existing Steam library and want the most polished, hassle-free handheld experience. Pick the ROG Ally if you need Game Pass, Battle.net or anti-cheat-protected multiplayer titles that Steam Deck struggles with. Pick the Legion Go if you want the biggest screen and most flexible controls and don't mind the extra size and weight in a bag.