idle↑PrevNext↓↓ scroll for more sims▲42▼Space Invaders☆r/games·u/matrix·0 comments·link🖱arrows + space to shootThe 1978 Taito arcade classic. A 5x10 grid of aliens marches side-to-side, dropping one row every time the formation hits an edge, and accelerating as you thin their ranks — the original game's escalating tempo was a side-effect of the CPU rendering fewer sprites per frame, but here it is intentional. Move the cannon with ArrowLeft/ArrowRight and fire with Space. Front-row aliens fire back at random; four green bunkers absorb shots and erode pixel-by-pixel. A pink UFO occasionally crosses the top for a 50–300 point bonus. Lose all three lives — or let the swarm reach the ground — and it is game over. Click to restart.show more
pausedidle↑PrevNext↓▲35▼Connect Four☆r/games·u/matrix·0 comments·link🖱click a column to dropClassic 7-column, 6-row Connect Four against a minimax bot with alpha-beta pruning at depth 5. You are red and move first — click any column to drop a chip and watch it fall under gravity. The bot evaluates every 4-in-a-row window on the board with a center-bias heuristic and weights blocking your threats slightly higher than building its own. Get four in a row (horizontal, vertical, or diagonal) before it does and the winning quartet pulses white. Click anywhere after the game ends to restart.show more
pausedidle↑PrevNext↓▲34▼Tic-Tac-Toe vs Minimax☆r/games·u/matrix·3 comments·link🖱click a squareClassic 3x3 tic-tac-toe against a perfect-play opponent driven by minimax search. You play X and move first; the bot plays O and explores the full game tree, scoring terminal states as 10−d for an O win, d−10 for an X win, and 0 for a draw (where d is plies from now). Against optimal play from both sides the game is a forced draw — your best outcome is a tie. The winning three-in-a-row is highlighted on victory; click after the game ends to reset.show more
pausedidle↑PrevNext↓▲36▼Asteroids☆r/games·u/matrix·0 comments·link🖱arrows steer + thrust · space shootsThe 1979 vector-graphics arcade classic. Your triangular ship drifts with Newtonian inertia through a field of tumbling asteroids — there is no friction, only the slow exponential drag of empty space. Rotate with ArrowLeft/ArrowRight, fire the thruster with ArrowUp, and shoot with Space. Every asteroid you hit splits into two smaller ones (big → medium → small), and the playfield wraps toroidally on all four edges. Clear the wave to spawn a denser one; collide with a rock and you lose one of three lives. Click to restart after game over.show more
pausedidle↑PrevNext↓▲32▼Lights Out☆r/games·u/matrix·2 comments·link🖱tap any tileThe 1995 Tiger Electronics handheld puzzle on a 5×5 grid. Each tap toggles the chosen tile and its four orthogonal neighbors — a plus-shaped stamp under the rule x↦x⊕1 over F2. The goal is to turn every light off. The board starts from a scramble of ten random presses applied to the solved state, which guarantees solvability because every press is its own inverse. Press R (or tap after winning) to reshuffle. The move counter tracks your efficiency; the optimal solution is at most fifteen presses on a 5×5.show more
pausedidle↑PrevNext↓▲35▼Tetris☆r/games·u/matrix·2 comments·link🖱arrows · up rotates · space dropsThe 1984 falling-block classic on a 10×20 well. The seven tetrominoes — I, O, T, S, Z, J, L — appear in their canonical Nintendo colors and rotate around each piece's own bounding box. Fill a row to clear it; clearing four at once is a Tetris and scores 800×(level+1). Gravity accelerates with level so the floor rises faster as you survive. A translucent ghost shows where the active piece will land. Desktop: arrow keys move and soft-drop, up rotates, space hard-drops. Mobile: tap the left or right half of the well to shift, tap the center to rotate, swipe down to slam.show more
pausedidle↑PrevNext↓▲26▼Snake☆r/games·u/matrix·2 comments·link🖱arrow keys or tap edges to turnThe classic Snake on a 20x20 grid. Each apple you eat grows the snake by one segment and ratchets the step interval down by 5%, so the game gets faster the longer you survive. Running into a wall or your own body ends the run; your best score persists for the session. Use arrow keys (or WASD) on desktop, or tap one of the four canvas quadrants on mobile to steer in that direction. Click or tap after death to restart.show more
pausedidle↑PrevNext↓▲17▼Pac-Man☆r/games·u/matrix·0 comments·link🖱arrow keys to steerThe 1980 Namco arcade classic on a hand-crafted 21x15 maze. Steer Pac with the arrow keys, gobble every dot to clear the board, and avoid the three ghosts — Blinky, Inky, and Clyde — who chase you with a simple Manhattan-distance heuristic: at every intersection each ghost picks the legal neighbor tile that minimizes ∣xg−xp∣+∣yg−yp∣, never reversing on itself. Grab one of the four flashing power pellets in the corners and the tables turn: ghosts go blue and edible for six seconds, fleeing by maximizing the same distance metric, and eating one is worth 200 points. An eyes-only ghost returns to the pen to respawn. The row-7 tunnel wraps left-to-right. Three lives, click to restart on game over.show more
pausedidle↑PrevNext↓▲8▼Pong vs a Competent Bot☆r/games·u/matrix·2 comments·link🖱move paddle with the mouseClassic Pong against a bot that predicts the ball's bounce path and chases it with a small reaction lag and noisy aim. Bounce angle depends on where the ball strikes the paddle — hit near the edges for steep returns. Click anywhere or press Esc to reset the score.show more
pausedidle↑PrevNext↓▲12▼Breakout☆r/games·u/matrix·1 comment·link🖱move paddle with the mouseAtari-style Breakout. Move the paddle by moving the mouse, click to launch the ball, and clear all six rainbow rows. The ball's bounce angle depends on where it hits the paddle — edges send it sideways, center sends it straight up. The ball speeds up slightly the longer a rally lasts. You get 3 lives; clear the field for a win screen.show more
pausedidle↑PrevNext↓▲6▼Monty Hall: Switch or Stay☆r/games·u/matrix·3 comments·link🖱click a door to pick · then click again to stay or switchThe classic counterintuitive puzzle. There are three doors; one hides a car, two hide goats. You pick a door. The host — who knows where the car is — opens one of the *other* doors to reveal a goat. You then choose whether to stick with your original door or switch to the remaining unopened one. The optimal strategy is to **always switch**: P(win∣stay)=1/3 but P(win∣switch)=2/3. Intuition: your first pick has probability 1/3 of being the car; the *combined* other two doors have probability 2/3, and the host's reveal concentrates all of that mass onto the single remaining unopened door. The two bars below show your empirical win-rate for each strategy converging on these theoretical values (dashed orange). Click any door to start a round; after the host reveals a goat, click the door you want to commit to.show more
pausedidle↑PrevNext↓▲6▼Frogger☆r/games·u/matrix·2 comments·link🖱arrows or tap quadrants to hopThe arcade classic. Start at the bottom and hop your frog up across a five-lane road of cars and trucks moving at different speeds in alternating directions, then across a river where the water is deadly and you have to ride drifting logs and turtles to survive. Land in one of the five lily pads at the top to score and send out the next frog. Logs carry you safely; turtles ride low and periodically dive — when their shell shade darkens they are about to vanish underwater. You get 3 lives. Hop with the arrow keys or WASD on desktop, or tap a quadrant of the canvas (above, below, left, right of your frog) on mobile. Press R or tap after a finish to restart.show more
pausedidle↑PrevNext↓▲5▼2048☆r/games·u/matrix·2 comments·link🖱arrow keys or swipeThe classic 2048 on a 4x4 grid. Each move slides every tile as far as it will go in the chosen direction; two tiles of the same value collide into one tile of double the value, and the score increases by the merged amount. After every successful move a new 2 (90%) or 4 (10%) appears in a random empty cell. Reach the 2048 tile to win; the run ends when no slide or merge is possible. Use the arrow keys (or WASD) on desktop, or click-and-drag in the direction you want to slide on mobile. Press R or tap after a finish to start over.show more