Games like New Worlds

Pardus is a free award-winning, real-time graphical game set in a futuristic universe that can be played right from your browser! In common: multiple factions, rivaling factions, trading.

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: space simulation, economy, spaceship.

Cookie Clicker is a Javascript-based browser video game written by French programmer Julien Thiennot, better known as "Orteil". In common: economy, spaceship, business.

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: space simulation, 4x (explore, expand, exploit, and exterminate), sandbox.

OGame is a strategy game set in space, with thousands of players from across the world competing at the same time. In common: space simulation, space strategy, spaceship.

Galactic Tycoons is a free multiplayer browser game where you command your own industrial empire. In common: economy, space, business.

Politics and War is a massively-multiplayer geo-political simulation game where players create their own country and compete against thousands of other… In common: politics, 4x (explore, expand, exploit, and exterminate), business.

An economic and political simulation that takes place in the late Medieval and early Renaissance ages. In common: economy, 4x (explore, expand, exploit, and exterminate), business.

Eclesiar is a free online multiplayer strategy game. In common: politics, economy, business.

This is a sandbox / rpg game similar to games like Terraria. In common: gravity, space, sandbox.