Confused by the term Over/Under? Well you don’t have to be. Our guide to CS2 Over/Under bets will explain exactly how this popular bet type works. Plus we’ll share our top CS2 Over/Under betting tips to help you find some winning picks.

CS2 Over/Under Bets Explained

An Over/Under (O/U) is a bet in which a betting site sets a number for a specific betting market, and you bet on whether the actual result will be under or over that number. For example, if a CS2 team’s total kills O/U is 15.5, you can back them to get under or over 15 1/2 kills in that match.

The best way to explain Over/Under betting in CS2 is to use an example. In the example below, we use Round betting on a map with Over/Under margins. The example below is fictional, and the odds type used is Decimal.

Let’s say the CS2 betting site gives a 20.5 round margin for a specific map in a match. This means you can bet on “under” or “over”. In the scenario below, one CS2 team is heavily favoured to win the match.

• To succeed if you bet on Under, the round total should be 20 or less (for example 13-7 or less) with odds of 1.45.
• To succeed a bet on Over, the round total should be 20 or more (for example, 13-8 or more) with odds of 2.15.

Depending on the teams playing, the Over or Under bets might give you different odds. If one team is heavily favoured to win, the payout for Under will be less than Over. This is due to the chance of an underdog pushing a heavily-favoured team to more than 20 rounds in a map being less likely.

Best Sites For CS2 Over/Under Bets

You’ll find plenty of CS2 Over/Unders on offer for each Counter-Strike match on the betting sites at the top of our rankings. We’ve included our list of the top CS2 betting sites available in your location just below!

Types of CS2 Over/Unders

As mentioned at the start of this guide, there are various types of CS2 Over/Under bets. In this section, we will explain how the most popular Over/Under bets work.

Total Maps betting

For this special Over/Under CS2 betting type, you will need to pick how many maps will be played in a best-of-three match. Picking “Over 2.5” means you think the match will go to a third map, ending 2-1. If you pick “Under 2.5”, you believe the match will end with a scoreline of 2-0. With this type of CS2 Over/Under bet, you don’t have to pick the match-winner.

CS2 Kills bets

Most popular bookmakers provide bettors with CS2 Kills bets, using the Over/Under system. Bettors will choose (per map) which players to bet on, and how many kills a player will get on a specific map. Generally speaking, there are only bets available for the first and second map.

For example, you can place an Over 17.5 bet on a player to score 18 or more kills on the first map, with various odds depending on the bookmaker’s confidence in the outcome. These bets are all pre-match, so you can’t use live betting.

Round betting

The last of the popular CS2 Over/Under bets is all about rounds on a specific map in a match. Bettors can choose from two options, for example, “Over 20.5” or “Under 20.5” rounds. Simply put, if a map goes to 20 Rounds, the “Over 20.5” will win.

If a map ends on the 20th round or less, the “Under 20.5” bet will win. Odds for Round betting type depends on how favoured one team is to win over the other. In a match that is expected to be close, the odds for the “Over” bets will be lower. Alternatively, when one team is heavily favoured, the odds for “Under” bets will be low, and visa versa. Some other CS2 Over/Under bets include:

• Total rounds won with the bomb exploding.
• Total rounds won by bomb defusal.
• The number of rounds won thanks to time running out.

There are even more CS2 Over/Under bets out there. Some bookmakers offer dozens of Over/Under types but the examples in this section are definitely the most popular.

CS2 Over/Under Betting Tips

Now that you know more about the types of Over/Under bets, and how the wagering works for this Special Bet, it’s time for three general tips. Please note that the five tips and tricks below include general information. We do not guarantee success with these tips and tricks. HLTV is not responsible for any losses incurred.

Do Your Research

The most important tip we can ever give you for CS2 Over/Under bets is to do research. While nothing is guaranteed when it comes to betting, diligent research can increase your chances of winning. At HLTV we’ve got you covered with team match histories, previous results, stats and more.

For example, if you plan on placing a Total Maps Over/Under bet, head to both teams’ match histories and look at their previous matches, noting if they tend to go to a third map, or if they tend to win or lose in two maps.

Understand The Odds

Odds represent the chance of a certain outcome occurring, so the less likely an outcome is, the lower the odds will be. The most popular odds used by most betting sites is Decimal Odds. Odds for each CS2 Over/Under bet represents the bookmaker’s confidence in a certain outcome occurring. Our CS2 betting odds section explains odds and wager types in detail.

Use Multiples To Increase Your Odds

Most of the time, CS2 Over/Under bets don’t provide massive odds for that potentially big payday. Odds generally range from 1.1 to 3.50 for this type of Special Bet. However, if you really want those exceptionally tasty odds, you can string Over/Under bets together in a Multibet. Learn more about CS2 Multibets in our dedicated guide, and remember, these types of bets are high-risk, with an exponential odds increase.

Use A Consistent Staking Method

Using an effective staking method while practising CS2 Over/Under betting could be a big part of your success. Betting strategies employ different types of staking methods, some riskier than others. Check out our dedicated guide to CS2 betting strategies featuring types of staking methods, and pick the one that fits your style.

Avoid Tilting

Tilting is a slang term that originated in poker, where a player, after taking a few losses, becomes frustrated, confused, or simply angry. When you tilt, you make rash decisions, which you should avoid at all costs when placing bets. Even the most accurate CS2 gambling experts can tilt, subsequently going on a losing streak due to poor, unresearched bets as well as emotional decisions.

One of the best tips we can give you when you feel you are tilting is to stop, take a breather, and come back the next day. Then, you can continue to bet making rational choices, instead of just throwing your gambling budget down the drain. Winners know when to stop, and when to come back to try again.

Responsible CS2 Gambling

A responsible approach to online gambling is essential, regardless of the type of wager you’re placing. You should never rely on gambling as a source of income. If your online betting habits are harming you or those around you, you need to stop. 

We recommend all HLTV users who regularly bet on Counter-Strike or esports take the Gamalyze self-assessment test. This brief examination will help you gain a more in-depth understanding of your gambling routines and recommend responsible gambling tools which could help you stay in control.

We also offer a wealth of additional betting resources for extra support. Here are some of our in-depth HLTV responsible gambling articles:

• Money Management – We’ve documented the money management tools available at most betting sites.
• Time Management – Uncover the time management tools you can use while betting on CS2.
• HLTV Responsible Gambling Commitment – Read more about our commitment to responsible gambling.

You should always gamble responsibly when betting online. You must be 18+ to play.