Clash of Vikings is an HTML5 strategy game inspired by Clash Royale that distills the card-battle format into fast three-minute matches against AI.

You build a deck of eight cards — troops, heroes, and spells — and deploy them onto a lane-based battlefield using elixir that regenerates over time.

Each unit marches automatically toward the enemy's towers, and your job is to decide what to deploy, where to place it, and when to spend versus save your resources. The game was originally released in February 2017 and later updated to its current HTML5 version in 2022.

What keeps matches interesting is the elixir management tension: every card costs a specific amount, and overspending leaves you unable to respond when the opponent pushes.

The final 60 seconds double your elixir regeneration rate, turning the end of each match into a frantic sprint of rapid deployments. This free online game runs directly in the browser on desktop, mobile, and tablet with no installation needed. All interactions use the mouse.

Select a card from your hand at the bottom of the screen, then left-click and drag it onto the battlefield to deploy that unit or spell. You can only place units on your own side of the river — the dividing line that splits the arena.

On mobile devices, tap a card and drag it to your desired position. There are no keyboard shortcuts; the entire game is controlled through clicking and dragging. Each match lasts three minutes. You and the AI opponent each have a main castle and guard towers.

Your goal is to destroy more of the enemy's towers than they destroy of yours before time expires. Destroying the enemy's main castle wins the match outright regardless of the timer.

If neither side has destroyed towers by the end, the player who dealt more tower damage typically wins. This means even a partially damaged tower matters — chip damage across multiple pushes adds up. Before each battle, you can customize your deck of eight cards in the deck menu.

Cards fall into three categories: troops are ground units that march toward enemy towers and fight anything in their path, heroes are stronger Viking warlords with higher stats that serve as tanks or high-damage dealers, and spells deal instant damage or create effects on a…