TRAIN [RMX] is a solo Gun Game to 24 points with a 15-minute limit and six-second auto-respawn. Kills advance the weapon sequence, while captured teleports move players to the train and handle the winner, observer, and end-game destinations.
Group size: Player count not playtested; start with your usual group and adjust after one round.
Things to try
Adapt your distance after every kill instead of treating the next weapon like the last one.
Learn where the train teleport lands before using it during a close race for the final points.
Builder lesson: test both a score-target finish and a timed finish so every winner and observer transition gets exercised.
Search the in-game Sandbox map browser for TRAIN [RMX] and check the creator is ArmsReach. Availability and names can change; this archive is a recorded snapshot.