Level Editors are surprisingly scarce in First Person Shooters these days.
Shootmania Storm looks to change all that.
One Angry Gamer "Now here’s a bit of news you probably didn’t see coming: Nadeo has announced that you can gain free access to their ManiaPlanet games right now, no strings attached. You download the free demo and for 48 hours straight you can play the ManiaPlanet titles for free."
Shootmania Platform, developed by Nadeo, will be free in its current beta form for the whole summer.
The Trackmania games rarely go on sale, so getting any and/or all of them is a recommendation.
Quake style gameplay, community assisted content, Nadeo devs, sounds like an instant win.