Teeworlds (formerly TeeWars) is a free, open-source sidescrolling multiplayer shooting game originally created by the Swedish developer Magnus Auvinen and now maintained by the community.

It features simple cartoon-themed graphics and physics and relies heavily on classic shooter weaponry and gameplay.

Teeworlds presents itself as a crossover between classic sprite-based shoot-em-up games of the arcade era and modern-day first-person shooters.

It is played on two-dimensional, side-scrolling maps typical of the platformer genre, but uses FPS-style keyboard controls for moving, switching weapons and chatting.

[4] In March 2008 with the 0.4.0 release, the original name "Teewars" was changed to Teeworlds by the developers for legal reasons.

[11] In August 2012 the game's content and assets were released under the Creative Commons license CC-SA 3.0.

Teeworlds has achieved broad usage in the open source game community, and it is available in many Linux distributions.

[2][21][22][23] After the 2015 release on Steam, Steamspy reported in 2016 over 450,000 game installations and around 17,000 active players over the last two weeks.

[26] Teeworlds was praised for its innovative, surprising and an addictive gameplay that's easy to learn and real fun to play.