Single-player games like Annexation
Below are 8 single-player Steam games similar to Annexation, 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 Annexation page.
Ranked picks
- 1
Demra: Rifts of War
Single-player alternative to Annexation — playable solo, no multiplayer required. Shares Strategy with Annexation.
Classic 90s RTS gameplay mixed with direct hero control and grid-based real-time movement. Command your army and wield powerful light magic to fend off the demon invasion.
- 2
Valdrax Beyond the Rift
Single-player alternative to Annexation — playable solo, no multiplayer required. Shares Strategy and Indie with Annexation.
Build a kingdom from nothing, forge your armies, and breach the rifts between worlds. Face endless enemies, recruit legendary creatures, and prepare for the ultimate battle against the Demon Lord. Every map is different. Every death is permanent.
- 3
Castles & Castellans
Single-player alternative to Annexation — playable solo, no multiplayer required. Shares Action and Strategy with Annexation.
Castles & Castellans is a hybrid of real-time strategy and third-person action. Rule from the castle-building RTS view - construct, manage, and fortify against looming threats. Then step into the castellan’s boots in TPP, fighting side by side with your soldiers atop the very walls you built.
- 4
Clankerfront
Single-player alternative to Annexation — playable solo, no multiplayer required. Shares Strategy and Indie with Annexation.
Clankerfront is a classic isometric RTS where AI research went too far and awakened the world’s home appliances against humanity. Build bases, command armies, fight solo or co-op, and defend the front from the clankers.
- 5
ZeroSpace
Single-player alternative to Annexation — playable solo, no multiplayer required. Shares Action and Strategy with Annexation.
ZeroSpace is a sci-fi hybrid RTS game with a story-rich, party-based RPG campaign. As commander of the Protectorate forces, you must upgrade your mothership, build strong relationships with your crew and recruit a formidable army. Navigate the hard choices that will shape humanity's future.
- 6
HyperCoven
Single-player alternative to Annexation — playable solo, no multiplayer required. Shares Strategy with Annexation.
HyperCoven is an old-school, fast-paced RTS where there's no time wasted collecting resources. Capture Coven all over the map, which will summon from among 55 unique units for you – for free. Only make sure they’re not snatched from you. Did we mention the map has no borders?
- 7
Sword & Banner
Single-player alternative to Annexation — playable solo, no multiplayer required. Shares Strategy with Annexation.
Mount & Blade meets Total War with classic RTS controls - brought to life in pixel art. Lead your warband across a living fantasy world, raid settlements, trade goods, and fight large-scale tactical battles with formations, dynamic weather, and an army you build from peasants to knights.
- 8
Crypt Keeper
Single-player alternative to Annexation — playable solo, no multiplayer required. Shares Action and Strategy with Annexation.
Unleash your inner necromancer in Crypt Keeper – a roguelite tower defense game. Raise skeleton armies, defend your crypt, and manipulate enemy waves with the ESSENCE-IAL update.