In most games survival is paramount. Dying will send you back to a previous checkpoint or, worse, to the beginning of a level. In Respawn death is mandatory - you must kill yourself constantly in order to proceed.
In Respawn you are in possession of a Spawn point, which you can throw around the world. The end result is a platform game with no jump button. In order to get from point A to point B, you must throw the spawn machine in the correct place.
It's an interesting gimmick, a neat twist. It never ends up being quite as much fun as I hoped it would be - a few more death animations would have cranked it up a notch - but still, an interesting concept and nicely impemented.
Probably best to give Respawn a go before Fox News reports it as a 'mass suicide simulator'.