OpenTS faithfully reconstructs Command & Conquer: Tiberian Sun as a fixed, lightweight standalone game. Warzone 2100, open-sourced from its own 1999 commercial release, has been continuously developed ever since and lets you design your own units from researched components — a much deeper systems-driven RTS. Pick OpenTS for Tiberian Sun specifically, Warzone 2100 for ongoing depth.
Both rebuild or continue late-1990s sci-fi RTS games, but OpenTS faithfully reconstructs Command & Conquer: Tiberian Sun, while Warzone 2100 has been continuously developed since its own 1999 release with a much deeper unit-design system.
| OpenTS | Warzone 2100 | |
|---|---|---|
| Status | Faithful reconstruction of a fixed 1999 game | Continuously developed since 1999 |
| Unit design | Fixed roster from the original game | Design your own units from researched components |
| Download size | ~15 MB | ~1.5 GB |
| Tech tree | Original Tiberian Sun tech tree | Deep, expansive research tree |
| Community size | Small, growing | Established, long-running |
| Pace | Classic Command & Conquer pace | Slower, more systems-heavy |
You want the fixed, faithful Tiberian Sun experience specifically.
You want a continuously developed RTS where you design your own units from researched parts.
Classic Command & Conquer Tiberian Sun rebuilt from the ground up: crisp modern bgfx graphics, lag-free UDP multiplayer, robust mission scripting, and total fidelity to Westwood's 1999 RTS masterpiece. You can play at native 1440p or 4K with instantaneous bgfx rendering, smooth scrolling, and zero legacy DirectDraw stutter.
Warzone 2100 has a surprisingly good answer to the question: what if an RTS actually let you build the army you wanted? Its technology tree and vehicle designer give it a level of experimentation that makes every campaign feel a little different. It's old-school strategy with an unusually satisfying amount of tinkering. You could say it lets you be the Supreme Commander
OpenTS faithfully reconstructs Command & Conquer: Tiberian Sun as a fixed, lightweight standalone game. Warzone 2100, open-sourced from its own 1999 commercial release, has been continuously developed ever since and lets you design your own units from researched components — a much deeper systems-driven RTS. Pick OpenTS for Tiberian Sun specifically, Warzone 2100 for ongoing depth.
You want the fixed, faithful Tiberian Sun experience specifically.
You want a continuously developed RTS where you design your own units from researched parts.
Yes. OpenTS is released under OpenTS engine: GPL-3.0; Tiberian Sun + Firestorm assets: freeware and Warzone 2100 under Open Source (GPL-2.0). Both are entirely free with no trials, paid tiers or in-game purchases.