55		Gemini Wars (Windows, 2012)
55		Naval War: Arctic Circle (Windows, 2012)
55		Graviteam Tactics: Operation Star (Windows, 2012)
55		Annex: Conquer The World (Windows, 2012)
55		Tryst (Windows, 2012)
54		Stellar Impact (Windows, 2011)
54		Picaroon (Windows, 2011)
53		Stellaris (Windows, 2016)
53		Homeworld: Deserts of Kharak (Windows, 2016)
52		Hive Rise (Windows, 2009)
51		Disney's Treasure Planet: Battle at Procyon (Windows, 2002)
51		Massive Assault Network 2 (Windows, 2006)
51		Carrier Command (DOS, 1989)
51		Massive Assault Network (Windows, 2004)
51		Conquest: Frontier Wars (Windows, 2001)
50		Philip José Farmer's Riverworld (Windows, 1998)
50		Pax Solaris (Windows, 2005)
50		Vtoraya Mirovaya: Izdanie Vtoroe (Windows, 2007)
50		Tanks vs Aliens (Windows, 2017)
50		Cyberstorm 2: Corporate Wars (Windows, 1998)
50		Nexagon Deathmatch (Windows, 2003)
50		Star Trek: Deep Space Nine - Dominion Wars (Windows, 2001)
50		Times of Conflict (Windows, 2000)
50		Machines (Windows, 1999)
50		Metalizer (DOS, 1998)
50		Force 21 (Windows, 1999)
50		Impossible Creatures (Windows, 2003)
47		Sins of a Solar Empire: Rebellion (Windows, 2012)
46		Homeworld: Remastered Collection (Windows, 2015)
44		Star Ruler (Windows, 2010)
43		Ancient Space (Windows, 2014)
43		Ground Control (Windows, 2000)
43		Homeworld: Cataclysm (Windows, 2000)
43		Homeworld (Windows, 1999)
43		Sins of a Solar Empire (Windows, 2008)
42		Star Ruler 2 (Windows, 2015)
42		Star Wolves 3: Civil War (Windows, 2009)
42		Mechs & Mercs: Black Talons (Windows, 2015)
41		Arena Wars Reloaded (Windows, 2007)
41		Homeworld 2 (Windows, 2003)
41		Metal Fatigue (Windows, 2000)
40		Armor Command (Windows, 1998)
40		Adeptus Titanicus: Dominus (Windows, 2018)
40		Final Demand: The Challenge (Windows, 1999)
40		7th Legion (Windows, 1997)
40		The Show (Windows, 2007)
40		Panic Soldier (DOS, 1997)

Notes: Games similar to Zero-K, Games like Zero-K, Windows, Strategy, Tactics, Sci-Fi, Futuristic, Real-Time, 1st-person, 3rd-person, Other, Mecha, Giant Robot, Tank, Spring Engine, PC, Game Similarities.