Konami Bonus

The Konami Bonus is one of many bonuses that can be awarded to the player upon finishing a Duel in most video games.

To obtain this bonus, the player must win the Duel with exactly 5730 Life Points remaining. Given the extreme difficulty of getting such an exact number of Life Points, it is often by far the most valuable of all bonuses; being worth about three to five times the number of DP compared to feats such as winning with fewer than 100 Life Points remaining, or winning with zero cards left in the Deck.

Method
As almost all Life Point, ATK, and DEF numbers in the entire game are multiples of 100 or at least 50, getting one's Life Points to end in a number like 30 can be a difficult task.

One of the simplest ways to make one's Life Points end in 30 is through activating "Mystik Wok" on a card like "King of Yamimakai", "Castle of Dark Illusions", "Reaper of the Cards", or "Barox" (and choosing DEF for the effect of "Mystik Wok"). Afterward, obtaining the bonus becomes a fairly straightfoward matter of taking just enough damage or gaining just enough Life Points to make them 5730 by the end of the Duel.

Yu-Gi-Oh! GX Tag Force 3
This game in particular is one of the easiest to obtain the Konami Bonus in. One particular opponent, Ms. Dorothy, uses a Deck named "Dorothy 02" that consist of nothing but Level 5 Normal Monsters, making the whole Deck useless. Therefore, if playing against this particular Deck, the opponent will not be able to make a single move, guaranteeing that your Life Points will not change unless you actively make them change.

Gather the following cards in your hand:
 * "Dark Magic Curtain"
 * "King of Yamimakai"
 * "Mystik Wok"
 * "Mooyan Curry"

Your Life Points are guaranteed to be at their initial 8000 before you perform the following combo:
 * Activate "Dark Magic Curtain", Special Summoning "Dark Magician" from your Deck. Your Life Points will now be 4000.
 * Tribute "Dark Magician" to Tribute Set "King of Yamimakai" in face-down Defense Position. ("Dark Magic Curtain" does not allow you to Tribute Summon.)
 * Activate "Mystik Wok", Tributing "King of Yamimakai" and selecting DEF. "King of Yamimakai" has 1530 DEF, so your Life Points will now be 5530.
 * Finally activate "Mooyan Curry" and choosing yourself for its recovery effect. Your Life Points will now be 5730.
 * As your opponent still has no way to play any cards, you can proceed to win the Duel and obtain the Konami Bonus.

In other games, the above four-card combo can still be used, although it will be more difficult to. It is recommended to play against an easy opponent who will have no way to damage you should you play a monster with a sufficiently high ATK or DEF, and leave that monster on the field while gathering and setting up the combo.

There is currently no known way to pull off the Konami Bonus using three or fewer cards, barring opponent intervention.

Trivia
In Japanese, the individual numbers 5, 7, and 3 can be pronounced go, nana, and mitsu respectively. Taking the first syllable of each and slightly altering the first sound produces ko-na-mi or Konami, hence the bonus's name and why it requires 5730 Life Points to achieve. The number 573 and derivatives of it can be frequently found as easter eggs in many products that Konami develops or publishes.