Slayer is a popular and common gametype in the Halo video game series. The object of the game is simply to kill as many opposing players as possible. It can be played in teams of anywhere from 2-8 in Team Slayer, or individually, in FFA.
Halo: Combat Evolved
Halo 2: Anniversary
Halo 5: Guardians
Slayer where all players spawn with random primary and secondary weapons, which range everything from basic loadout weapons to power weapons.
In Halo 3, Fiesta Slayer was used in the Cinco de Mayo Double EXP weekend hopper, and was an FFA mode. Halo 4 features team-based Fiesta modes in Team Action Sack. Fiesta Slayer was added to Halo 5: Guardians in the Hammer Storm update. Super Fiesta is a gamemode in Halo 5: Guardians that features all the power weapon REQs that were previously exclusive to Warzone and campaign.
'Nades 'n Spades
Hammerzeit ("zeit" being German for "time") is a reference to MC Hammer's song U Can't Touch This. See also Hammer Time.