This collection includes fifteen different casual games that you can play in five minutes or less. It includes Sudoku, a minesweeper game, Mahjong, a version of Reversi and more. Operating System: Linux.
29. I Have No TomatoesHow many tomatoes can you smash in ten minutes? This "extreme leisure time activity" comes from the same team as Those Funny Funguloids. Operating System: Windows, Linux.
30. KDE Games
This is the collection of casual games for the KDE desktop. It includes a solitaire variation, a version of breakout, a golf game, a version of Risk, a minesweeper, sudoku and more. Operating System: Windows, Linux.
In this game, players must tilt the floor to guide a ball through an obstacle course. The game includes lots of levels or you can design your own. Operating System: Windows, Linux, OS X.
Did you spend hours playing Lemmings back in the 90s? If so, Pingus is for you. It's a remake of Lemmings (with penguins instead of lemmings) with 77 different levels. Operating System: Windows, Linux, OS X.
This puzzle game features ants who can push over dominoes arranged in various patterns. The player must get all the dominoes to fall and send the special trigger through the exit in order to get to the next level. Operating System: Windows.
Another bubble shooter, Zaz challenges you to hit balls as they travel along a preset path. The twist is that your shooter is also traveling along a path, making things just a little more difficult. Operating System: Windows, Linux.
Designed for those age five and under, ChildsPlay helps teach sounds, letters, numbers and basic keyboard skills. It also includes some games like memory, pong and pacman. Operating System: Windows, Linux, OS X.
Exercise your mind with GBrainy's logic, word, math and memory games. It's fun and educational for players of all ages. Operating System: Windows, Linux.
Made for children ages 2 to 10, GCompris includes more than 100 different activities, most of them educational. It includes math, geography, science, reading, keyboarding and art games, plus chess, sudoku, memory and much more. Operating System: Windows, Linux.
Solve arithmetic problems quickly before the incoming comets kill the penguins. This simple game reinforces math facts for elementary age students. Operating System: Windows, Linux, OS X.
39. Alien Arena
Built "for fraggers by fraggers," Alien Arena is an intense deathmatch shooter with a retro sci-fi theme. Many different sites offer hosted servers for online games, and there are also plenty of fan sites with playing tips and more. Operating System: Linux, Windows, OS X.
Because of its light weight, AssaultCube can run on older hardware, despite its very good realistic graphics. It supports single-player or multi-player games and includes 26 different maps and 12 different game modes. Operating System: Linux, Windows, OS X.
41. Classic Nexuiz
Downloaded more than 6 million times, Nexuiz is one of the most popular open source shooter games. A few years ago, a new closed-source version of the game was created, but you can still download the classic version from the link above or from SourceForge. Operating System: Windows, Linux, OS X.
This multi-player game is a clone of Quake III Arena and features 13 different weapons, 51 arenas, 18 player characters and 12 types of games. The project's owners warn, "Due to violent and occasional racy content, it's unsuitable for children under the age of 17." Operating System: Windows, Linux, OS X.
43. Red Eclipse
This casual first-person shooter has received excellent reviews. Features include Parkour, impulse boosts, dashing, several game modes and a built-in level editor. Operating System: Windows, Linux, OS X.
This award-winning game mixes elements of a real-time strategy game with a first-person shooter. Users can choose to play as aliens or humans, always with the goal of eliminating the other team. Operating System: Windows, Linux, OS X, XBox.
TrueCombat claims to be "perhaps the best free tactical-realism shooter. EVER." It's a modern world combat simulator with two opposing teams. Note that in order to use it, you will also need Wolfenstein: Enemy Terriroty (see below). Operating System: Windows, Linux, OS X
Forked from Tremulous, Unvanquished pits "technologically advanced humans against hordes of highly adaptable aliens." It's under very active development with a new release every month. Operating System: Windows, Linux, OS X
The self-proclaimed "most fast-paced sport on the Web," Warsow is a cartoonish shooter featuring "Rocketlauncher-wielding pigs and lasergun-carrying cyberpunks." Unlike most shooters, it doesn't have a lot of blood and guts, and the emphasis is on movement. Operating System: Windows, Linux, OS X.
Although there are several proprietary Wolfenstein games, this one is open source. It's a World War II-era game that pits the Axis against the Allies. Operating System: Windows, Linux, OS X
49. World of Padman
Based on the Quake engine, this shooter is very cartoonish with little gore. Quite a few online servers are available, or you can play offline. Operating System: Windows, Linux.
Xonotic was forked from the classic version of Nexuiz. It has more than 22 different maps, 16 weapons and lots of different gameplay modes. Operating System: Windows, Linux, OS X.
51. Zero Ballistics
Part first-person shooter, part tank game, Zero Ballistics is set in a picturesque mountain environment and has more than 81 different tank setups available. Play deathmatch, team deathmatch or the unique beaconstrike game mode. Operating System: Windows, Linux, OS X.
52. Frets on Fire
Frets on Fire is a lot like Guitar Hero, and it can even play Guitar Hero songs (though other songs are available as well). No worries if you don't have a guitar controller—you can also play with the keyboard. Operating System: Windows, Linux, OS X.
This is a free version of Dance Dance Revolution, which challenges users to stay in rhythm to the beat of the music. You can use dance pads (if you have them) to play, or you can just use the keyboard. Operating System: Windows, Linux/Unix, OS X, XBox.
54. Ultrastar Deluxe
If karaoke is your thing, you'll love Ultrastar Deluxe. For this game, you must sing along to the music on pitch and in the correct rhythm. It comes with more than 10,000 songs included. Operating System: Windows, Linux, OS X.
Tux Racer is a much-loved older game that features Tux the Linux penguin sliding down a mountain on his belly. Extreme Tux Racer updates the classic game for today's players. Operating System: Windows, Linux, OS X.
56. Speed Dreams
This fork of the TORCS auto-racing game (see below) features an updated UI and many new cars and tracks. As in TORCS, the visuals are excellent. Operating System: Windows, Linux.
This cartoonish racer features Tux the Linux Penguin and friends driving go karts. Guide them around the tracks, while avoiding a horde of silly obstacles. Operating System: Windows, Linux, OS X.