


Two Egypt-themed maps: Little Trouble and Flagrante.Finally, My Burden is a variation of deathmatch where one person holds an item and gets points for holding it, while other players must kill the holder in order to get the item. Beast Hunt and Team Beast Hunt are a competitive version of traditional co-op, as it lets players compete to see who can get the best score at the end of a level. Last Man Standing and Team Last Man Standing give each player one life, and the last person (or team) wins. Team Deathmatch has been added, allowing people to play deathmatch in teams. Competitive gameplay received many new gamemodes. For co-op, a new game mode called coin-op co-op was created, which adds score and limited lives. Medals are given for surviving for a certain amount of time. Both single player and multiplayer have survival, which pits the player against an endless horde of enemies. Serious Sam HD: The Second Encounter features the same game modes as Serious Sam HD: The First Encounter, but many new game types have been added. Scorematch has been removed for unknown reasons.

Serious Sam HD: The First Encounter has single-player, cooperative and deathmatch game modes. This makes online gameplay smoother and more consistent for those with modern connections. The HD remakes also have improved net-code that fully takes advantage of modern internet connections unlike Serious Sam 1, which was built around modems. The inverted-gravity effect in The First Encounter and The Second Encounter has been removed and Scythian Witch-Harpies can no longer carry Beheaded Kamikazes due to issues regarding the engine.

Not everything has been kept in the remakes. Gameplay-wise, Serious Sam HD functions pretty much the same as it does in the old games. The level layouts have been kept, but nearly all of the graphics, textures, models, lighting and special effects have all been updated. Serious Sam HD consists of high-definition remakes of Serious Sam: The First Encounter and Serious Sam: The Second Encounter using a newer version of the Serious Engine: Serious Engine 3.
