An interactive weight gain game puts you in control of every bite. Tap, drag and feed a cheerful character yourself, and watch their size respond to exactly what you do. Our two free games are built around hands-on feeding mechanics — no passive cutscenes, just responsive, satisfying play. No download, no sign-up, and 100% family-friendly.
Both react to your input in real time — click a card to start feeding.
Hands-on feeding at its best: tap or drag burgers, donuts and shakes onto Mochi and the 3D model reacts instantly, puffing up with a squishy bounce.
▶ Play Feast Feeder 3D — FreeActive, reflex-driven feeding: steer down the buffet, grab every dish you can reach, and your character bulks up the more you interact. Fast and replayable.
▶ Play Buffet Rush 3D — FreeThe word "interactive" matters more than it sounds. Plenty of so-called weight gain "games" are really just animations you click through — you press a button and watch a pre-baked sequence. An interactive weight gain game is different: the character responds to you, in real time, every time. The size you see on screen is a direct result of the food you chose to feed and how you fed it. That tight feedback loop is what makes the genre satisfying.
Feast Feeder 3D is the clearest example of interactive feeding done right. Each item you drop is a real input the engine reacts to — the 3D model puffs up, bounces, and settles based on what you did. Nothing happens unless you make it happen. Buffet Rush 3D takes interactivity in a faster direction: your steering and timing decide how many dishes you grab, so the better you play, the bigger your character gets before the clock runs out.
Both interactive weight gain games are free, browser-based, mobile-friendly, and 100% SFW — your input drives everything you see.
Because the feeding mechanics are designed for both touch and pointer input, the interactivity feels native whether you're on a phone, tablet, or computer. Tap on mobile, click on desktop — the games read your input the same way and respond instantly. There's nothing to install and no account to create; the interaction starts the moment the page loads.
Curious about real-life weight gain after all that feeding? Use our free Weight Gain Calorie Calculator to find your daily surplus and read our weight gain meal plan for nutrient-dense ideas.
An interactive weight gain game responds to what you do in real time. Instead of watching a fixed animation, you tap, drag, or steer to feed the character yourself, and their size changes based on your input — so the result feels like something you caused, not something you watched.
Feast Feeder 3D uses click or tap to drop food onto the character. Buffet Rush 3D uses mouse, arrow keys, or swipe to steer down the buffet. Both support touch on phones and tablets and a mouse or keyboard on desktop.
Yes. Both interactive weight gain games are 100% free, run in your browser, and need no download or sign-up.
Yes. Every game on weightgain.us is 100% SFW. A cute cartoon mascot simply gets pleasantly round from eating, with no nudity, fetish, or adult content.
Yes. Both games are mobile-friendly with full touch support, so the interactive feeding mechanics work just as well on a phone or tablet as on a computer.
Both interactive weight gain games are free and load instantly in your browser. Pick one and start feeding.