Here is how individual points are going to work in Block Wars Season 3 | Origins 18! Assume that points are individually gained unless explicitly said. Decimal points will always be rounded up.

Spleef

+3 for outlasting a player

+5 for eliminating a player

Points given at the end of every round depending on your placement for that round:

1st (Winning): +70
2nd: +63
3rd: +56
...
23rd: +3
24th: +2
25th: +1
26th and after: +0

For more details, see this graph: https://tommy.s-ul.eu/6X7FnxhF

Basically: Take the previous placement's points and multiply it by 0.9 (Rounded down)

Battle

+2 for outlasting a player

Points for kills: +48 for a kill before border

+32 for a kill from border shrinking to when sudden death starts

+20 after that.

Current kill points are shown on the top of the screen.