seven games · free · no sign-up
Browser games by SourceStrongAI. No downloads, no sign-ups: they load and play straight in the browser, on desktop or phone.
3D crowd-runner
An endless 3D crowd-runner with three difficulty levels. Steer a growing army through math gates, dodge blades and hammers, fight bosses, and run as far as you can. Free, no download, no sign-up, plays straight in the browser.
Play Soldier Surfer →Mental-math arcade
Mental math practice that feels like an arcade: Sprint, Survival and Zen modes, four difficulties, six operation types, tap-or-type answers, combos, XP levels and daily streaks: free in your browser.
Play Number Nova →Stacking puzzle
A free online stacking puzzle: steer falling blocks, clear lines, level up as the speed climbs. Keyboard on desktop, big touch buttons on mobile.
Play Block Drop →Memory pairs
A free memory pairs game: flip two cards at a time and match every pair in as few moves as you can across three board sizes, with best-score tracking.
Play Flip Match →Equation crossword
A free cross-math puzzle: fill the grid so every row and column reads as a true equation using the digits 1–9 exactly once. Three difficulties, hints, daily puzzles.
Play Cross Math →Flash-anzan math
Flash-anzan mental math: numbers flash one at a time. Hold the running total in your head and type it. Four speeds, mixed operations, streak multipliers.
Play Flash Sums →Memory matrix
A free memory-matrix game: a pattern of tiles flashes, you tap the ones you remember. Adaptive difficulty from 3×3 to 7×7 grids, twelve trials, perfect-board bonuses.
Play Mind Snap →You start with ten soldiers and you never stop running. The whole crowd moves as one, and you steer it left and right across three lanes with a drag, the arrow keys, or by tilting your phone.
Every few seconds a pair of gates crosses the track, each stamped with a number and an operator. Green gates build the army: +40, ×2, ×3. Red gates take it apart: −25, ÷2. You can only pass through one, so every pair is a small decision made at speed: a ×3 on the far side of the track may be worth crossing two lanes of spinning blades for, and it may not. Pick wrong late in a run and two hundred soldiers vanish in a single pass.
Past ninety soldiers (the crowd's onscreen cap) the overflow starts fusing into bronze Brutes, twenty-five at a time, and gold Titans once it tops two hundred and fifty, so a big army stops being a mob and becomes a column of giants. The run only ends when the count reaches zero.
Blades, hammers and barriers shave soldiers off the back of the crowd. Enemy squads stand on the track and shoot back, and your army returns fire automatically. More soldiers means more rifles, so the army that survives the gates is also the army that wins the fights. Every so often the road clears and a war wave rolls in, or a boss with a health bar plants itself in the lane. Weapon pods swap the whole crowd onto miniguns, shotguns, lasers or rockets for about twelve to fourteen seconds.
The start screen has a difficulty switch, and it changes two things at once. First, the math gates: on Hard they sit closer together and roll meaner numbers. More red gates sooner, red-and-red “pick the lesser evil” pairs from 350 metres, subtractions that bite deeper. Easy spreads the gates out and keeps the math gentle. Second, the events: Hard fields bigger enemy squads that shoot faster, and bosses, war waves, meteor showers and ambushes unlock earlier and fire far more often. The global spacing between events drops by roughly a quarter (250m → 180m). Medium is the shipped baseline. Your choice is saved on your device and applies to every run until you change it.
Number Nova turns mental-math practice into an arcade: pick Sprint (60-second score rush), Survival (three lives against a shrinking clock) or Zen (untimed practice), set one of four difficulties, choose which operations appear (addition, subtraction, multiplication, division, squares, percentages) and answer by tapping a choice or typing it on a keypad. Combos multiply your score, XP levels persist between sessions, and daily streaks reward coming back. Block Drop is a stacking puzzle: steer falling blocks with arrow keys or big touch buttons, clear rows before the stack tops out, and ride the speed curve as levels climb. Flip Match is memory pairs: flip two cards at a time across three board sizes and beat your best move count. Cross Math is an equation crossword: fill the grid with digits 1–9 so every row and column reads true against its target, with three difficulties, hints, and a shared daily puzzle. Flash Sums is flash-anzan training: numbers flash one at a time, you hold the running total in your head and type it: four speed tiers with streak multipliers. Mind Snap is memory-matrix training: a pattern flashes, you tap it back. The grid grows from 3×3 toward 7×7 as you improve.
Crowd runners are a branch of the endless-runner genre. Instead of steering one character down a lane, you steer a whole crowd, and numbered gates along the track multiply, add to, subtract from or divide it: if you like endless runners, Soldier Surfer will feel familiar: the twist is that the number on screen is your health, your firepower and your score all at once.
No. It runs in the browser on desktop and mobile, with no download, no sign-up and no account. Your best distance, coins and power-ups are saved locally on your own device. On a phone you can add it to your home screen and it will open full screen like an app.