# Portfolio Every few years, a bigger game. Here are 100+ of them, in five drawers — from learning games built out of Y Combinator to shooters that run on a ₹8,000 phone. Read the story behind the big ones, or play them. ## TapToLearn — Educational games Games-first, tablet-first learning, built in the San Francisco Bay Area out of Y Combinator W12 and ImagineK12. 50+ titles, 20M+ downloads, used in 18,000 schools. - **Math vs Zombies** (2012, iPad · Web) — Solve math to zap zombies — the TapToLearn flagship, rebuilt for the browser. · Top-10 Education [Play](https://www.taptolearn.com/apps/math/) [Story](https://roby.us/work/taptolearn.html) - **Tiny Countries** (2012, iPad · Web) — Drag, drop and learn every country on the map. · Geography for K–8 [Play](https://www.taptolearn.com/apps/geography/) [Story](https://roby.us/work/taptolearn.html) - **Tiny Fractions** (2012, iPad · Web) — Fractions you can see and touch. [Play](https://www.taptolearn.com/apps/fractions/) [Story](https://roby.us/work/taptolearn.html) - **Grammar App** (2010, iPhone · iPad · Web) — Grammar as a game, one sentence at a time. [Play](https://www.taptolearn.com/apps/grammar/) [Story](https://roby.us/work/taptolearn.html) - **Spell with Friends** (2013, iOS) — Spelling practice with friends — #1 paid in Education on the App Store. [Story](https://roby.us/work/taptolearn.html) ## Trivia — SuperQuiz ++ Quiz and party games — some of the earliest trivia hits on the App Store, now free in the browser at superquiz.com. - **Guess The Movie** (2008, iOS · Web) — Name the film from a poster, a prop or a single emoji. · Early App Store hit [Play](https://www.superquiz.com/guess-the-movie) [Story](https://roby.us/work/superquiz.html) - **Think** (2014, iOS → Web) — Picture rebus puzzles, featured by the App Store in 2014 — and free in your browser since 2026. · 516 puzzles [Play](https://www.superquiz.com/think) [Story](https://roby.us/work/superquiz.html) - **Hollywood Hero** (2014, iOS · Web) — Movie trivia starring Joe Hollywood, stumbling hero. [Play](https://www.superquiz.com/hollywood-hero) [Story](https://roby.us/work/superquiz.html) - **Banate Raho** (2026, Web) — Fake answers, real friends — a bluffing party game for your living room. · 2–10 players [Play](https://www.superquiz.com/banate-raho) [Story](https://roby.us/work/superquiz.html) - **Logo Quiz** (2010, iOS · Web) — Half a logo. Name the brand. [Play](https://www.superquiz.com/logo-quiz) [Story](https://roby.us/work/superquiz.html) ## Arcade — Pick up, play, one more go Short-session games tuned for the thumb — from June Software's combat racer to the bird the whole world knows. - **Road Riot** (2013, iOS · Android · Web) — The original combat racer, rebuilt for the browser from its own source code. [Play](https://www.june.games/roadriot/) [iOS](https://apps.apple.com/us/app/road-riot-combat-racing/id646803444) [Story](https://roby.us/work/road-riot.html) - **Flappy Bird** (2026, Web · Mobile) — The bird is back — the original Flappy Bird, and now Flappy Bird Islands: flap, spin, raid, build. · The original [Play](https://flappybird.io) [Story](https://roby.us/work/flappy-bird.html) - **NinJump Dash** (2013, Mobile) — We licensed the NinJump IP and built NinJump Dash on our Tiny Run engine — a top-10 game worldwide, and where we learned free-to-play. · Top 10 worldwide [ABC News](https://abcnews.com/Technology/thanksgiving-travel-boredom-busting-apps-pass-time/story?id=27193872) - **Motu Patlu Rush** (2017, Mobile) — An endless runner with India's favourite cartoon duo. ## Worlds — Building universes Games as places: characters, lore and live seasons people come back to for years. Tower Conquest, Silly Royale, Indus — and Prime Rush, the same world rebuilt for Brazil and the Middle East. - **Silly Royale** (2021, Android) — Social deception with friends — a million installs in its first 30 days. · 25M players · Best of Play 2023 [Story](https://roby.us/work/silly-royale.html) - **Tower Conquest** (2017, Android · iOS) — A tower-defense battler with a cast of 70+ characters, live for nearly a decade. · 25M installs · 70+ characters [Android](https://play.google.com/store/apps/details?id=com.sgiggle.towerconquest) [Story](https://roby.us/work/tower-conquest.html) - **Indus Battle Royale** (2024, Android · iOS) — An Indo-futuristic battle royale — "the Wakanda of India". #1 on the App Store at launch. · 10M+ installs · Play Best of 2024 [Site](https://www.indusgame.com) [Story](https://roby.us/work/indus.html) - **Prime Rush LatAm** (2026, Android · iOS) — The Indus world rebuilt for Brazil — Latino-futurism, with Brazil's biggest esports house. · 1M+ installs · with LOUD [Android](https://play.google.com/store/apps/details?id=com.indusgame.play) [iOS](https://apps.apple.com/us/app/prime-rush-battle-royale-game/id1578906909) [Story](https://roby.us/work/prime-rush.html) - **Prime Rush MENA** (2026, Android · iOS) — The same world for Saudi Arabia and Egypt — Arabic-futurism. · with PlayHera [Site](https://www.primerushmena.com/) [Story](https://roby.us/work/prime-rush.html) ## Multiplayer Shooters — Real-time, on our own engine Authoritative multiplayer that runs on the phones people actually own. MaskGun went to 110M+ installs; Indus reached three million installs in its first week. - **Indus Battle Royale** (2024, Android · iOS) — An Indo-futuristic battle royale — "the Wakanda of India". #1 on the App Store at launch. · 10M+ installs · Play Best of 2024 [Site](https://www.indusgame.com) [Story](https://roby.us/work/indus.html) - **Prime Rush LatAm** (2026, Android · iOS) — The Indus world rebuilt for Brazil — Latino-futurism, with Brazil's biggest esports house. · 1M+ installs · with LOUD [Android](https://play.google.com/store/apps/details?id=com.indusgame.play) [iOS](https://apps.apple.com/us/app/prime-rush-battle-royale-game/id1578906909) [Story](https://roby.us/work/prime-rush.html) - **MaskGun** (2019, Android · iOS) — 5v5 multiplayer FPS on our own engine. Three years in soft launch before it worked. · 110M+ installs [Android](https://play.google.com/store/apps/details?id=com.junesoftware.maskgun) [iOS](https://apps.apple.com/us/app/maskgun-online-shooting-game/id956736147) [Story](https://roby.us/work/maskgun.html) - **Battle Stars** (2023, Android · iOS) — 4v4 hero shooter. 3M installs in four weeks; Google Play's Best Made in India. · 15M · Play Best of 2023 - **Showdown** (2026, Roblox) — Anime FPS with jutsu abilities — one of two SuperGaming titles in Roblox's Fall Games Preview. · 1M MAU [Roblox](https://www.roblox.com/games/125538696653169/Showdown-Anime-FPS-Jutsu-Shooter) [Story](https://roby.us/work/showdown.html)