Single-player games like Onion Force
Below are 9 single-player Steam games similar to Onion Force, 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 Onion Force page.
Ranked picks
- 1
Dungeon Defenders: Awakened
Single-player alternative to Onion Force — playable solo, no multiplayer required. Shares Action and Strategy with Onion Force.
Dungeon Defenders: Awakened is co-op Tower Defense combined with epic Action RPG combat. You’re able to join forces with up to four players to take on a never-ending army of orcs, demons, and dragons! Are your defenses strong enough to save the world of Etheria?
- 2
Orcs Must Die! 2
Single-player alternative to Onion Force — playable solo, no multiplayer required. Shares Action and Strategy with Onion Force.
You’ve tossed, burned and sliced them by the thousands – now orcs must die more than ever before! Grab a friend and slay orcs in untold numbers in this sequel to the 2011 AIAS Strategy Game of the Year from Robot Entertainment.
- 3
Aegis Defenders
Single-player alternative to Onion Force — playable solo, no multiplayer required. Shares Action and Strategy with Onion Force.
Take on wild beasts, ruthless soldiers, and ancient gods in this 2D Action-Platformer inspired by Tower-Defense combat.
- 4
Fieldrunners 2
Single-player alternative to Onion Force — playable solo, no multiplayer required. Shares Action and Strategy with Onion Force.
Get ready to DEFEND THE WORLD! The biggest sequel in tower defense history is finally here: Fieldrunners 2 has arrived! From Subatomic Studios, creators of the award winning classic strategy game comes an all new adventure that was years in the making.
- 5
Defend Your Life: TD
Single-player alternative to Onion Force — playable solo, no multiplayer required. Shares Action and Strategy with Onion Force.
Defend Your Life! Is tower defense set in human body where players are fighting against villain hordes of viruses and bacteria. Levels and units correspond to reality of human anatomy.
- 6
Deathtrap
Single-player alternative to Onion Force — playable solo, no multiplayer required. Shares Action and Strategy with Onion Force.
Deathtrap is a Tower Defense game with strong action-RPG elements, a game of vicious tricks, killing machines, rotating blades and splattering blood.
- 7
Doom Sweeper
Single-player alternative to Onion Force — playable solo, no multiplayer required. Shares Strategy and Indie with Onion Force.
DOOM SWEEPER is a 2D pixel-style game. Clean up the approaching zombie climax, and exchange it for cash, embarking on a journey to become an arms dealer in the apocalypse. Complete the game, unlock more items in the shop, and achieve various achievements to obtain different CG!
- 8
Revenge of the Titans
Single-player alternative to Onion Force — playable solo, no multiplayer required. Shares Action and Strategy with Onion Force.
The ultimate mash-up of Real-time Strategy and Tower Defense!
- 9
Spinch
Single-player alternative to Onion Force — playable solo, no multiplayer required. Shares Action and Indie with Onion Force.
Transcend the material realm and assume your true form as Spinch, a hyper-agile organism consumed by the quest to rescue a litter of its missing offspring, in this side-scrolling, psychedelic platformer from the mind of award-winning Canadian cartoonist, Jesse Jacobs.