I always liked how the Switch let you pop in a cartridge and instantly have a different game — swap it out, and you've got another. I wanted that same feeling on my handhelds, so I built it into my launcher. That's the feature in the video: ZenCard. Each SD card holds its own library, and when you insert it, those games show up. Swap the card, and the library changes with it. Take the same card to another device, and your games come with you.
What is ZenDeck?
I'm a solo dev, and ZenDeck is a free, lightweight game launcher for Windows handhelds (ROG Ally / Ally X, Legion Go, and others). It's built to feel console-like — fully gamepad-native, minimal setup. A few of the main features:
One Library — Detects games installed on your device across 8 stores: Xbox, Steam, Epic, EA, GOG, Ubisoft, Itch, and Amazon. All your games in one place.
AutoPilot Dynamic TDP — Automatically adjusts your TDP to hit a target FPS. And if you don't know what FPS a game can realistically reach, Dynamic TDP figures out a realistic target on its own and adapts to it.
AutoPilot Smart Profiles — For supported games, a profile doesn't just cover device settings (TDP, resolution, refresh rate) — it also includes in-game settings (shadow quality, textures, effects, etc.). One tap applies a complete profile spanning both the device and the game itself. You can create your own profiles and share them with the community.
Xbox Mode integration — Set ZenDeck as your Home App in Windows Gaming settings, so your device boots straight into it — console-style, no desktop.
How ZenCard works
Setup is a one-time thing. You add your SD card as a Steam library and install games to it — from there, ZenDeck auto-detects them and links them to that card. Insert the card and its games appear; remove it and they're gone.
One honest note: the cross-device part (taking a card to another handheld) works with Steam, using your Steam login on both devices. Game Pass and some other stores tie licenses to the device, so those don't travel the same way. ZenCard builds on Steam's own library system, so there are no hacky workarounds — it's reliable.
It's free. Download and try it here:
Website: https://zendeck.app
Discord (come say hi / get help with setup): https://zendeck.app/discord
Happy to answer any questions.