Banished, Katamari Damacy, Manifold Garden, World of Goo, Antichamber, From Dust, Little Inferno, Just Shapes and Beats, LYNE, Parallax, the Virtual Villagers games I think, Particulars, Prelogate, Reus, Super Hexagon I suppose

de Blob 1 and 2 is an edge case; it's a game about going through levels painting and liberating cities from an enemy. the violence is pretty abstract and there's no blood but you do fight things I guess.

Scribblenauts and the Tasty Planet games are also edge cases. The first technically allows violence but you can probably do things nonviolently, while in the second, I guess you're technically eating living things but it's literally just 'they were there, you moved over them, now they're not there anymore', no blood

Plague Inc might qualify on a technicality as the violence isn't graphically represented but I don't think that's in the spirit of this post lmao