80		Even the Ocean (Windows, 2016)
70		Vesta (Windows, 2018)
56		Rochard (Windows, 2011)
55		Capsized (Windows, 2011)
54		Explodemon! (Windows, 2011)
54		Abandon (Windows, 2009)
53		Out There Somewhere (Windows, 2012)
53		Doctor Who: The Eternity Clock (Windows, 2012)
53		Head Over Heels (Windows, 2004)
52		Ittle Dew (Windows, 2013)
52		Zack Zero (Windows, 2013)
52		Finding Paradise (Windows, 2017)
51		Figment (Windows, 2017)
51		Crashlands (Windows, 2016)
51		Rex Rocket (Windows, 2014)
51		Kynseed (Windows, 2018)
51		No Thing (Windows, 2016)
51		D/Generation (DOS, 1991)
51		Super Motherload (Windows, 2014)
51		Scooby Doo! & Looney Tunes Cartoon Universe: Adventure (Windows, 2014)
51		Wizard of Legend (Windows, 2018)
50		Rocketbirds 2: Evolution (Windows, 2017)
50		Stryx (DOS, 1990)
50		The Jetsons in By George, in Trouble Again (DOS, 1990)
50		The Summoning (DOS, 1992)
50		Loot Rascals (Windows, 2017)
50		Alien Rampage (DOS, 1996)
50		The Last Tree (Windows, 2017)
50		Yono and the Celestial Elephants (Windows, 2017)
50		Party Hard 2 (Windows, 2018)
50		Big Crown: Showdown (Windows, 2018)
50		Sky Cat (DOS, 1991)
50		Flynn Sprint (DOS, 1996)
50		Beat (Windows, 2018)
50		The Great Escape (Windows, 2018)
50		The Kristal (DOS, 1989)
50		Hereafter (Windows, 2017)
50		Fossil Hunters (Windows, 2018)
50		Alien Rampage (Windows, 2017)
50		D/Generation (Windows, 2015)
50		Snowy: Space Trip (Windows, 2004)
50		Exile's End (Windows, 2015)
50		The Great Escape (DOS, 1987)
50		SEEP Universe (Windows, 2015)
50		Hyphen (Windows, 2015)
50		MagNets (Windows, 2015)
50		Darkness Assault (Windows, 2015)
50		Super Mustache (Windows, 2016)
50		Farscape: The Game (Windows, 2002)
50		Ode to Zelda: The Second Quest (Windows, 1999)
50		The Way (Windows, 2016)
50		Shadow Complex: Remastered (Windows, 2015)
50		Ittle Dew 2 (Windows, 2016)
50		Hyperspace Delivery Boy! (Windows, 2002)
44		Landstalker: Treasure of King Nole (Windows, 2011)
41		Stealth Inc. 2: A Game of Clones (Windows, 2015)
41		Millie (Windows, 2014)
41		Atomik: RunGunJumpGun (Windows, 2016)
40		The Eternal Castle (Windows, 2019)
40		Eaten Alive (Windows, 2015)
40		Epistory: Typing Chronicles (Windows, 2016)
40		Neophyte: The Journey Begins (Windows, 1997)
40		An Alien with a Magnet (Windows, 2017)
40		Cobalt (Windows, 2016)
40		Hush (Windows, 2015)

Notes: Games similar to ProtoGalaxy, Games like ProtoGalaxy, The Source Studio, The Source Studio, Windows, Action, Sci-Fi, Futuristic, Puzzle elements, Bird's-eye view, 2D scrolling, PC, Game Similarities.