Like X-Morph: Defense
30 games, the closest first
Halo: Spartan Assault
X-Morph: Defense, but solo, and a third of the hours
Mixed · 78%Top-Down Shooter · Twin Stick Shooter
The Ascent
X-Morph: Defense, but an action RPG, and open world
Mixed · 73%Top-Down Shooter · Twin Stick Shooter
Alien Swarm: Reactive Drop
X-Morph: Defense, but free to play, and even better loved
Loved · 95%Twin Stick Shooter · Top-Down Shooter
Alien Breed: Impact
X-Morph: Defense, but third-person, and more divisive
Mixed · 74%Aliens · Twin Stick Shooter
Alien Breed 2: Assault
X-Morph: Defense, but third-person, and more divisive
Mixed · 70%Aliens · Twin Stick Shooter
Defense Grid: The Awakening
X-Morph: Defense, but solo, and three times the hours
Loved · 96%Tower Defense · Aliens
Infested Planet
X-Morph: Defense, but real-time with pause, and solo
Loved · 94%Tower Defense · Aliens
SAS: Zombie Assault 4
X-Morph: Defense, but with zombies, and about survival
Liked · 86%Top-Down Shooter · Twin Stick Shooter
Yet Another Zombie Defense HD
X-Morph: Defense, but with base building, and a quarter of the hours
Liked · 82%Tower Defense · Top-Down Shooter
Brigador: Up-Armored Edition
X-Morph: Defense, but with mechs, and cyberpunk
Loved · 93%Twin Stick Shooter · Top-Down Shooter
Tesla vs Lovecraft
X-Morph: Defense, but Lovecraftian, and with mechs
Loved · 90%Top-Down Shooter · Destruction
Taur
X-Morph: Defense, but a base builder, and with robots
Liked · 80%Tower Defense · Top-Down Shooter
SYNTHETIK
X-Morph: Defense, but an action roguelike, and co-op
Loved · 94%Top-Down Shooter · Twin Stick Shooter
Destroy All Humans!
X-Morph: Defense, but funny, and open world
Loved · 92%Aliens · Villain Protagonist
Fortified
X-Morph: Defense, but a third of the hours, and more divisive
Mixed · 75%Tower Defense · Aliens
Ultimate Zombie Defense
X-Morph: Defense, but with zombies, and about survival
Liked · 85%Tower Defense · Top-Down 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.