GameSir G8 Galileo Type-C Stretchable Mobile Gamepad
design
Most mobile controller grips I’ve come across in the past lean towards a slimmed down, Joy-Con-style form factor. It makes sense from a portability perspective but it’s never felt like something I could happily use for more than a quick session. The GameSir G8 Galileo has gone firmly in the other direction. The grips are chunky, pleasantly contoured, and feel closer to a stock Xbox Series X pad than anything else in this category. As someone with reasonably large hands who has always preferred the Xbox controller shape over the DualShock (sorry, PlayStation fans), the G8 Galileo felt immediately like home. Take away the slightly wider profile when the phone is seated and with a blindfold on I’d have sworn I was holding a regular gamepad.
GameSir has opted for a full-height phone deck rather than a thinner bracing bar, which gives the whole unit a reassuring solidity. There’s no creak or flex, the spring-loaded extending mechanism moves with confidence and the rubberised grips inside the cradle hold everything firmly in place. I tested with a POCO X5 Pro 5G and an iPhone 17 Pro and both sat comfortably with camera bumps nesting neatly in the extended section. The marketing materials make a point of the laser-engraved grip texturing on the back, though I wouldn’t have guessed that’s what it was had I not been told. Sorry, GameSir. It feels like any other textured finish I’ve tested, functional and pleasant enough but nothing that warrants a marketing bullet point.
The pivoting USB-C connector on the other hand is a highlight of the design that GameSir probably undersells. It deserves a specific mention because it tilts to allow far easier access and makes seating and removing your phone noticeably less stressful than controllers with a rigid port. It’s a small, thoughtful detail and one I hope others pinch.
Case compatibility, as is so often the case, is where things fall down. GameSir recommends cases under 1mm but that rules out just about everything you’d actually use. There’s maybe 1-2mm of clearance when the phone is properly seated, and while I managed to connect with a slim iPhone case still on, the angle it forced the USB-C connector into quickly convinced me to take it off. If your case has any substance to it, you’re going to be removing it every time. It’s not a dealbreaker, but it adds a layer of faff that works against the pick-up-and-play appeal.
Three replacement thumbstick caps come in the box (short, tall, and dome), swappable via magnetic faceplates that pop off without tools. It’s a clean, simple system. The catch is that GameSir has only included one of each alternate option, so you can’t run a matching pair unless you stick with the defaults. The stock caps are decent, with textured edges that look more than a little Xbox-inspired, but including singles rather than pairs feels like an unnecessary saving on what is otherwise a well-specced package. The face button caps aren’t swappable on this model either, that’s a G8+ feature.
The GameSir G8 Galileo only comes in a single grey colourway, which is a bit of a shame at a time when most peripheral brands are offering at least a couple of options. The grey is inoffensive enough and unlikely to clash with whatever phone you’re slotting into it, but a black or white alternative wouldn’t have gone amiss.
performance
Fair play GameSir, a few minutes into Fortnite and I’d already started to forget I was playing on my phone, which is about the best thing you can say about a mobile controller grip. The GameSir G8 Galileo handles natively supported titles with ease, though I did find myself having to launch games through the GameSir app more often than I’d have liked to make sure the controller was actually picked up. Titles that rely on hardware mapping, like Call of Duty Mobile, were a bit more temperamental. I spent a good half hour convinced the mapping was broken before working out that the game insists you complete its touch-based tutorial before it’ll accept any controller input.
The Hall effect joysticks are the highlight. They’re smooth with loads of precision available, though they’re noticeably more sensitive than others I’ve tested, including on console controllers like the Nacon Revolution X Unlimited. For players with more talent than me that’s probably a positive, but for more casual players like myself, there’s a small adjustment period. My unit needed calibrating out of the box to centre the left stick, but the GameSir app made short work of it and the sticks have been spot on since.
Hall effect triggers complete the input package and they’re similarly impressive. There’s a full range of analogue travel, and playing Forza Horizon 5 via Xbox Game Pass cloud gaming gave me precise throttle control that felt comparable to a dedicated console pad. A hair-trigger mode is available for shooters too, shortening the actuation distance to more of a mechanical click for faster response. What I appreciated was that this mode still honours the deadzone settings configured in the app, so you’re not sacrificing your fine-tuning for speed.
The G8’s D-pad is clicky with a short travel when you commit, though the initial feel is slightly mushy with a fair bit of wobble. More frustrating is the screenshot button placement directly below it, sitting just a touch too close to D-pad down for comfort. I accidentally triggered it mid-game more than once and it feels like a placement that could have been avoided without much effort.
Two programmable buttons sit around the back, which is a noteworthy inclusion at this price point for a mobile controller grip. I generally have a complicated relationship with back buttons but these are well executed. They’re properly sized, positioned where your fingers naturally rest, and take just enough force to avoid accidental presses without being stiff. They ship unbound, so you’ll need the GameSir app to set them up, but once configured they add a useful extra layer to your control scheme.
The 3.5mm headphone jack at the bottom is another welcome bonus for latency-free wired audio, particularly on phones that have long since dropped the port. Passthrough charging worked without any issues throughout testing, with both phones still reporting fast charge speeds while connected through the controller and no overheating concerns.
summed up
The GameSir G8 Galileo does something I wasn’t expecting from a mobile controller, it made me want to keep playing on my phone. The full-size grips are comfortable enough for longer sessions, the Hall effect sticks and triggers perform at a level you’d expect from something considerably more expensive, and the inclusion of programmable back buttons, passthrough charging, and a headphone jack at £79.99 makes the price hard to argue with. You will need to ditch your phone case and you will likely accidentally screenshot your way through a firefight at least once, but those are liveable compromises for a controller grip that otherwise punches well above its weight.
For Android users who want a console-like mobile gaming experience without spending console-controller money, the G8 Galileo makes a strong case for itself. iPhone users can get it working in a pinch, but without GameSir app support it’s a compromise, and stepping up to the G8+ is the better move for full functionality.
