1.OpenRCT2 / OpenRCT2
An open source re-implementation of RollerCoaster Tycoon 2 🎢
+32 stars
from 16,498 · score 3.50
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8 repositories by Attention Score · Oct 27, 2026 – Nov 2, 2026 (UTC)
2.Warzone2100 / warzone2100
Command the forces of The Project in a battle to rebuild the world after mankind has been nearly destroyed by nuclear missiles. A 100% free and open source real-time strategy game for Windows, macOS, Linux, BSD+
+17 stars
from 4,011 · score 2.89
3.TeamHypersomnia / Hypersomnia
Multiplayer top-down shooter made from scratch in C++. Web version: https://play.hypersomnia.io Made in 🇵🇱
+12 stars
from 1,702 · score 2.56
4.TrinityCore / TrinityCore
TrinityCore Open Source MMO Framework (master = 12.1.5.70688, 3.3.5 = 3.3.5a.12340, cata classic = 4.4.2.60895)
+9 stars
from 10,843 · score 2.30
5.multitheftauto / mtasa-blue
Multi Theft Auto is a game engine that turns Grand Theft Auto: San Andreas into networked multiplayer.
+7 stars
from 1,883 · score 2.08
6.pokerth / pokerth
PokerTH is a poker game written in C++/Qt.
+4 stars
from 690 · score 1.61
7.teeworlds / teeworlds
A retro multiplayer shooter
+2 stars
from 2,652 · score 1.10
8.yvt / openspades
Compatible client of Ace of Spades 0.75
+2 stars
from 1,248 · score 1.10