Single-player games like Iron Onslaught
Below are 9 single-player Steam games similar to Iron Onslaught, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Iron Onslaught page.
Ranked picks
- 1
Void Vanguards
Single-player alternative to Iron Onslaught — playable solo, no multiplayer required. Shares Action and Strategy with Iron Onslaught.
Void Vanguards is a sci-fi action shooter with rogue-like elements and intense planetary exploration. Each planet offers a unique environment - defeat every enemy wave, gather their resources, and unlock/upgrade your weapons to advance further into the void.
- 2
Alien Grounds
Single-player alternative to Iron Onslaught — playable solo, no multiplayer required. Shares Action and Indie with Iron Onslaught.
Single-player arena shooter. Weird weapons. Relentless robots. Easy to play, hard to score. Enter the chaos, shoot the bots, and compete in the Monthly Challenge.
- 3
Uploaded
Single-player alternative to Iron Onslaught — playable solo, no multiplayer required. Shares Action and Indie with Iron Onslaught.
Uploaded is a fast-paced, parkour, online multiplayer, and single-player shooter created by only one developer where you play as a robot with a human mind uploaded to it.
- 4
Rule No. 3 Downpour
Single-player alternative to Iron Onslaught — playable solo, no multiplayer required. Shares Action and Indie with Iron Onslaught.
An arcade arena-shooter FPS about slipping into the flow-state and getting directly to the action as fast as humanly possible. Get overwhelmed by enemies and compete with your friends for hi-scores!
- 5
Solo Royale
Single-player alternative to Iron Onslaught — playable solo, no multiplayer required. Shares Action and Strategy with Iron Onslaught.
Solo Royale is an offline, single-player battle royale game. It is a fast-paced battle royale, getting the player immediately into the action. Solo Royale also has a gulag game mode, where the player faces off in a single-elimination 1v1.
- 6
Mido and Di
Single-player alternative to Iron Onslaught — playable solo, no multiplayer required. Shares Action and Indie with Iron Onslaught.
Mido is an alien kid having nightmares about zombie aliens. One night he draws a creature, Di, and it comes alive to teach Mido how to fight zombies.
- 7
SolicitorZ
Single-player alternative to Iron Onslaught — playable solo, no multiplayer required. Shares Action and Indie with Iron Onslaught.
You have 10 Minutes to Kill 100 Solicitorz trying to invade your little peaceful vacation cabin in the woods. Use your handy dandy weapons to eradicate those imposters! Good night and Good Luck!
- 8
STHELL
Single-player alternative to Iron Onslaught — playable solo, no multiplayer required. Shares Action with Iron Onslaught.
STHELL is a fast-paced, roguelite arena shooter that takes you to a forgotten swamp that was a test site of Kiratron Industries. Take on hordes of machines left to rust for years. It's a battle you probably won't win, but make a stand and your resilience will be etched in their memory chips forever.
- 9
Warrens Of Random
Single-player alternative to Iron Onslaught — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Onslaught.
Warrens Of Random is a minimalistic horror game where you must survive 20 challenging mazes. Every time you do survive, there's a chance that you'll randomly spawn in a previous or future maze.