Let’s be frank here and start off by admitting that id’s Doom 3 isn’t a brilliant game. It’s a decent game based on an excellent engine istead. Happily, it also is a game you can easily grab for a particularly modest price and a fantastic platform for some impressive, imaginative, smart, offbeat, at times retro and absolutely free mods. ButtonSmasher, celebrating its first freeware related post, has gone and selected some (well, six actually) of the best for your enjoyment:

- Doom Reborn is an attempt at reviving the original Doom of yore on a shiny new engine. Quite successfully too.

- Zombie Slayer might still be in a demo stage, but if brutalizing the (traditional) undead is your thing and have been waiting for the evolution of Dragon’s Lair style mechanincs, you’ll adore it.

- OpenCoop which actually does what it says on the tin.

- Mgib Gib’s Maze that totally transforms Doom 3 into a cartoony ultra cute nightmare. A rare offering sporting both monkeys and labyrinths.

- Ground Zero should probably turn out to be the best thing to ever happen using the D3 engine. Far for completion, but alredy a very promising post-apocalyptic RPG.

- Rotoscope Cartoon Shader. It will truly change the way the game looks and satisfy the more pretentious among us. Uhm, us that is…