Infallible

Infallible is one of the achievements in the game Fall Guys: Ultimate Knockout.

Strategy
This is very likely Fall Guys' most difficult achievement, and for good reason - the luck-based nature of the achievement means it can be very difficult to rack up the necessary wins while maintaining the streak.

Keep practicing, practicing, and practicing. While you can influence the skill-based modes to a higher extent the more skilled you are, the Team games will be the largest stumbling block. To try to minimise the risk, squad up with a few friends that can help to make your life easier in these modes (and in the final modes where they can potentially waylay your other opponents for you).

It is somewhat arguable but generally recommended not to actively chase this achievement, as it will only cause a lot of frustration otherwise. Play as you normally would and try not to get too worked up on starting/maintaining a streak. Thankfully, this achievement does not require earning all five wins within one session, so you could win, close the game, and boot it up to attempt to continue the streak at a later time.

The alternate strategy would be to select special playlists instead of Main Show that feature interesting gimmicks, like Hex-a-gone Trials - especially if you are particularly good at the maps that may be selected to be played. Squads Show is also a possibility if you have multiple skilled friends to help you to the wins.