Games like Cataclysm: Dark Days Ahead

A Molyjam inspired platformer from Askiisoft, which seeks to answer the question "What if the pause button was a weapon?" In common: instant replay, unreliable narrator, secret area.

Lurkers is a chaotic 2D multiplayer sandbox where you can build, battle, and survive! In common: crafting, zombies, open world.

Tower of Heaven is a retro-style platformer with black and green color palette reminiscent of GameBoy games and a chiptune soundtrack. In common: unreliable narrator, original soundtrack release, deliberately retro.

Kron Wars is a persistent browser-based sci-fi MMO where players trade, mine, build corporations, wage wars, hunt bounties, and control entire sectors across… In common: death, crafting, 4x (explore, expand, exploit, and exterminate).

A combat-less farming sandbox roguelike. In common: crafting, roguelike, open world.

A persistent browser MMO set in a 1:1 scale solar system built on real NASA MOLA/LOLA altimetry data, with real orbital physics. In common: 4x (explore, expand, exploit, and exterminate), open world, sandbox.

An atmospheric zombie horror. In common: post apocalyptic, zombies, freeware.

A Dark Room is an open-source software role-playing text-based game originally published in mid 2013 for web browser by Doublespeak Games. In common: ascii, roguelike, survival.

Talewyn Harbor is a free-to-play multiplayer browser game set in a persistent coastal world. In common: crafting, open world, sandbox.

A survival RPG with a huge open world for 1-10 players to explore, with towns full of NPCs to talk to, dungeons to delve into, and adventure to be had. In common: deliberately retro, open world, survival.