54		Star Traders 4X: Empires in Exile (Windows, 2014)
54		The Last Federation (Windows, 2014)
54		Naval War: Arctic Circle (Windows, 2012)
54		Frozen Synapse: Prime (Windows, 2014)
54		Star Hammer: Tactics (Windows, 2012)
53		Battle Isle 2200 (DOS, 1994)
53		Sword of the Stars II: Lords of Winter (Windows, 2011)
53		Imperium (Windows, 2015)
53		Sid Meier's Starships (Windows, 2015)
52		Battleships at Dawn (Windows, 2016)
52		Future Wars (Windows, 2010)
52		Armageddon Empires (Windows, 2007)
51		MissionForce: CyberStorm (Windows, 1996)
51		Alien Assault (Windows, 2009)
51		Frozen Synapse 2 (Windows, 2018)
51		Battle Isle (DOS, 1991)
51		Carrier Command (DOS, 1989)
51		Massive Assault Network 2 (Windows, 2006)
51		Gaiflame (Windows, 2017)
51		Massive Assault Network (Windows, 2004)
50		Sea Quest (DOS, 1992)
50		Battle Isle '93 - The Moon of Chromos (DOS, 1993)
50		Stelcon 2469 (DOS, 1992)
50		Battles of Destiny (DOS, 1992)
50		Laser Squad (DOS, 1992)
50		Space Conflict (DOS, 1993)
50		Armada (DOS, 1992)
50		Discovery: In the Steps of Columbus (DOS, 1992)
50		Laserwars (DOS, 1994)
50		Advanced Strategic Command (DOS, 1998)
50		Royal Battleships (Windows, 2018)
50		Kto spotka UFO (DOS, 1994)
50		Star General (DOS, 1996)
50		Nectaris (DOS, 1995)
50		The Grandest Fleet (DOS, 1994)
50		Star General (Windows, 1996)
50		Space Marines: Der stählerne Kaiser (DOS, 1995)
50		World War II: Battles of the South Pacific (DOS, 1993)
50		Renegade Legion: Interceptor (DOS, 1990)
50		Commanders: Attack of the Genos (Windows, 2008)
50		Fireteam 2200 (DOS, 1991)
50		Advanced Strategic Command (Windows, 2001)
50		Em@il Games: X-COM (Windows, 1999)
50		Daleks (Windows, 2002)
50		Cyberstorm 2: Corporate Wars (Windows, 1998)
50		Em@il Games: Battleship (Windows, 1999)
50		Mayhem Intergalactic (Windows, 2007)
50		Golem (Windows, 2004)
50		Crush! Deluxe (Windows, 1997)
50		Firezone (DOS, 1988)
50		Crimson Fields (Windows, 2001)
50		The Lost Admiral (DOS, 1991)
50		Imperial Space Command (DOS, 1986)
50		Daleks (DOS, 1985)
50		Power: The Game (Windows, 1995)
44		Frozen Synapse (Windows, 2011)
42		Power Dolls 2 (Windows, 2016)
41		Alien River (DOS, 2017)
40		Power Dolls (DOS, 1995)
40		Power Dolls (Windows, 1997)
40		Ginga Eiyū Densetsu V (Windows, 1998)
40		Dune III (DOS, 1995)

Notes: Games similar to Leviathan: Warships, Games like Leviathan: Warships, Pieces Interactive AB, Paradox Interactive AB, Windows, Strategy, Tactics, Sci-Fi, Futuristic, Turn-based, Top-down, Naval, Watercraft, Unity, PC, Game Similarities.