Imperium vs World War X
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Imperium
Lead the Roman legions to victory against barbarian hordes and Carthaginians. Strategize your battles and become the champion Rome needs. A tactical autobattler set in ancient Rome.
- Tactical autobattler gameplay
- Lead Roman legions
- Battle barbarian hordes
- Conquer Carthaginians
- Strategic combat
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The barbarian hordes of Gaul, and the cunning Carthaginians have almost brought Rome to its knees. The Roman people pray to Jupiter for a champion to drive out these enemies, will that champion be you?
World War X
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Merge your troops and command your armies. Crush real players in fast auto-battles. World War X is a real-time PvP auto-battler that's easy to learn but hard to master — draft your deck, merge units to power them up, and outsmart live opponents in minutes-long matches. THREE FACTIONS, ONE WAR Build armies from the Human military machine, the psionic Alien swarm, or the relentless Zombie horde. 25+ unique troops, each with its own role — from Marines and Siege Tanks to Zombie Behemoths and Alien Motherships. MERGE TO DOMINATE Combine matching troops mid-match to level them up and turn the tide. Unlock new units mid-match to counter your opponent. Every round you draft, merge, and reposition — smart play beats big spending. REAL-TIME PvP ARENAS Climb the ranked ladder across six arenas. Match against live players, win trophies, and prove your strategy is the best. CAMPAIGN MISSIONS & PvE Progress through the campaign and strategize against epic raid bosses and varied game modes. ABILITIES & AUGMENTS Customize your units with game-changing powers mid-battle — Tactical Jump, Mass Cloak, and more. Equip augments to build a deck that fits your style. ENDLESS WAYS TO PLAY • Boss Strike — unload on a massive boss with a fully-upgraded army • Survival — how many rounds can you last? • Holdout — Defend your siege tank from incoming forces • Campaign — 65+ missions of escalating PvE chaos Your army. Your strategy. Your arena. Download World War X and start the war!
Screenshots
Verdict
The clearest difference is ads: Imperium at none against World War X's shown. Imperium also leads on iOS requirement (13.0 vs 15.0). World War X's advantage is update cadence (every 2 days vs every 2 weeks). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Imperium sells 2 one-off in-app purchases and World War X sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Imperium ships an update every 2 weeks, World War X every 2 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.
| Parameter | Imperium | World War X |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (30 ratings) — better | — |
| Positive reviews | 72.0% of reviews | — |
| Number of ratings | 30 — better | — |
| Update frequency | Every 2 weeks | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 89 MB | 258 MB |
| Age rating | 9+ | 12+ |
| Developer | Rene Slump | Daniel Chao |
In-app purchases
Imperium
- Pouch of Gems$3.99
- Chest of Gems$12.99
World War X
- Epic Level-Up (Lv 6)$4.99
- Monthly Pass$4.99
- Legendary Path$7.99
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- Epic Level-Up (Lv 8)$8.99
- 5 Guaranteed Epics$9.99
- Legendary Level-Up (Lv 10)$14.99
- Guaranteed Legendary$17.99
- Legendary Level-Up (Lv 11)$19.99
- Legendary Level-Up (Lv 12)$29.99
- Legendary Level-Up (Lv 13)$39.99









