OpenArena

OpenArena is a completely free and open-source arena FPS built on the GPL-licensed id Tech 3 engine. Rather than requiring the original commercial game's assets, the OpenArena team created its own characters, weapons, maps, sounds, textures, and other content to turn the underlying technology into a standalone game.

The result is a shooter built around speed, mechanical skill, and map control. Matches are intentionally straightforward: pick a mode, enter an arena, grab weapons and power-ups, and start fighting. There are no unlock trees, loadout systems, battle passes, or progression mechanics getting between you and the actual game.

Movement is a major part of the skill ceiling. Strafe jumping, rocket jumping, plasma climbing, weapon knockback, and other movement techniques allow experienced players to move around maps at speeds that can initially seem absurd. Learning to move efficiently is just as important as learning to aim.

The arsenal is similarly designed around situational decision-making. Different weapons excel at different ranges and circumstances, while ammunition and map pickups encourage players to learn the locations of important resources. Controlling those resources can be just as important as winning individual firefights.

OpenArena also offers a surprisingly broad selection of multiplayer formats. Alongside traditional Free For All, Team Deathmatch, and Capture the Flag, the game includes modes such as Harvester, Overload, Elimination, One Flag, Double Domination, and Last Man Standing. Instant Gib provides an especially chaotic alternative where the railgun becomes the central weapon.

Bots are available for offline play, making OpenArena approachable even when you don't have an active server or group ready to play. For players who want to go deeper, the game supports extensive configuration, custom maps, models, and modifications.

And because the project is open source, OpenArena isn't simply a free game—it is something players can actually modify, redistribute, and build upon. The project licenses its code and content under the GPL, while continuing to maintain its own community infrastructure.

The official site currently lists version 0.8.8 as the current release, while a much larger OA3 content reboot remains planned.

For PlayBound, that's what makes OpenArena particularly interesting. It's a snapshot of the arena-shooter era, but it isn't trapped there. It's a community-built, completely free game that preserves a style of FPS design where your movement, aim, game sense, and knowledge of the arena are the progression system.