Like Halo: Spartan Assault
30 games, the closest first
Alien Breed 2: Assault
Halo: Spartan Assault, but co-op
Mixed · 70%Top-Down Shooter · Twin Stick Shooter
Alien Swarm: Reactive Drop
Halo: Spartan Assault, but free to play, and even better loved
Loved · 95%Twin Stick Shooter · Top-Down Shooter
HELLDIVERS
Halo: Spartan Assault, but couch co-op, and five times the hours
Loved · 90%Top-Down Shooter · Twin Stick Shooter
Alien Shooter
Halo: Spartan Assault, but gorier, and even better loved
Loved · 96%Top-Down Shooter · Top-Down
X-Morph: Defense
Halo: Spartan Assault, but a tower defense game, and three times the hours
Loved · 91%Top-Down Shooter · Twin Stick Shooter
RUINER
Halo: Spartan Assault, but cyberpunk, and twice the hours
Liked · 89%Top-Down Shooter · Twin Stick Shooter
UBERMOSH
Halo: Spartan Assault, but pixel art, and faster
Loved · 91%Twin Stick Shooter · Top-Down Shooter
SAS: Zombie Assault 4
Halo: Spartan Assault, but with zombies, and three times the hours
Liked · 86%Top-Down Shooter · Top-Down
Hatred
Halo: Spartan Assault, but darker, and you're the villain
Liked · 85%Twin Stick Shooter · Top-Down Shooter
POSTAL
Halo: Spartan Assault, but psychological horror, and harder
Loved · 92%Top-Down Shooter · Twin Stick Shooter
Crimsonland
Halo: Spartan Assault, but couch co-op, and three times the hours
Loved · 92%Top-Down Shooter · Twin Stick Shooter
Nex Machina
Halo: Spartan Assault, but harder, and cyberpunk
Liked · 87%Twin Stick Shooter · Top-Down Shooter
Livelock
Halo: Spartan Assault, but with robots, and with mechs
Liked · 80%Top-Down Shooter · Twin Stick Shooter
Meltdown
Halo: Spartan Assault, but couch co-op, and twice the hours
Liked · 85%Twin Stick Shooter · Top-Down Shooter
The Ascent
Halo: Spartan Assault, but an action RPG, and open world
Mixed · 73%Top-Down Shooter · Twin Stick Shooter
SYNTHETIK
Halo: Spartan Assault, but an action roguelike, and five times the hours
Loved · 94%Top-Down Shooter · Twin Stick Shooter
The Hong Kong Massacre
Halo: Spartan Assault, but with bullet time, and gorier
Mixed · 72%Top-Down Shooter · Twin Stick Shooter
Nation Red
Halo: Spartan Assault, but about survival, and with zombies
Liked · 89%Top-Down Shooter · Twin Stick Shooter
Brigador: Up-Armored Edition
Halo: Spartan Assault, but with destruction, and with mechs
Loved · 93%Top-Down Shooter · Twin Stick Shooter
Relic Hunters Zero: Remix
Halo: Spartan Assault, but free to play, and pixel art
Loved · 93%Top-Down Shooter · Twin Stick Shooter
Splatter - Zombiecalypse Now
Halo: Spartan Assault, but post-apocalyptic, and noir
Liked · 89%Top-Down Shooter · Twin Stick Shooter
12 is Better Than 6
Halo: Spartan Assault, but a stealth game, and hand-drawn
Liked · 84%Top-Down Shooter · Shooter
State of Anarchy Complete: Master of Mayhem
Halo: Spartan Assault, but funny
Liked · 85%Top-Down Shooter · Twin Stick Shooter
Add another you loved
How this list is made
Each game is measured against each of your picks the way a games-like list measures it: the Steam community tags, Steam genres and IGDB themes they share, each counting for more the fewer games carry it. A game's place is how alike it is to your picks together, as a share of each pick's best match, so one alike to two of them comes before one alike to just one. It must be close to at least one of them, as close as it would have to be on that game's own list.
None of your picks is on the list, nor a second release of one, nor a game of their own series. Up to 30 games are shown. Under each name, the kinds it shares with the pick it is closest to, and how it differs from that pick.