Streamlabs event list based on Nerd or Die's sample, converted to scroll horizontal instead.

streamlabs_horizontal.css

@import url("https://fonts.googleapis.com/css?family=$font_family");

html,
.widget-EventList li > div {
    -webkit-transform: rotateX($rotate_x) rotateY($rotate_y);
    transform: rotateX($rotate_x) rotateY($rotate_y);
}

* {
    margin: 0;
    padding: 0;
    list-style: none;
    box-sizing: border-box;
    font-family: "$font_family";
    letter-spacing: 1px;
}

.widget-EventList {
    position: absolute;
    top: 0;
    left: 0;
    height: 100px;
    width: 1000px;
}

.widget-EventList li {
    height: 50px;
    width: 0;
    display: inline-block;
    overflow: hidden;
    margin-bottom: 1px;
    -webkit-animation: grow .4s ease-in 1 forwards;
    animation: grow .4s ease-in 1 forwards;
    opacity: .1;
}

.widget-EventList li:nth-child(1) {
    opacity: 1;
}

.widget-EventList li:nth-child(2) {
    opacity: .75;
}

.widget-EventList li:nth-child(3) {
    opacity: .5;
}

.widget-EventList li:nth-child(4) {
    opacity: .25;
}

.widget-EventList li:nth-child(5) {
    opacity: .1;
}

.widget-EventList li:nth-child(6) {
    opacity: .1;
}

.widget-EventList li:nth-child(7) {
    opacity: .1;
}

.widget-EventList li:nth-child(8) {
    opacity: .1;
}

.widget-EventList li:nth-child(9) {
    opacity: .1;
}

.widget-EventList li:nth-child(10) {
    opacity: .1;
}

li div {
    opacity: 0;
    padding: 0 50px 0 10px;
    height: 50px;
    margin-left: 1px;
    float: left;
    line-height: 50px;
    position: relative;
    color: $text_color;
    -webkit-animation: info .5s ease-in 1 .6s forwards;
    animation: info .5s ease-in 1 .6s forwards;
    background: #222;
    /* info */
}

div.background {
    opacity: 0;
    padding: 0;
    width: 50px;
    height: 50px;
    background-size: 42px 42px !important;
    background-position: 4px 3px !important;
    background: url("https://uploads.twitchalerts.com/000/070/135/721/star-l.png") no-repeat $theme_color;
    float: left;
    margin-left: 0;
    -webkit-animation: icon .5s ease-in 1 .4s forwards;
    animation: icon .5s ease-in 1 .4s forwards;
    /* icon */
}

.donation .background {
    background: url("https://uploads.twitchalerts.com/000/070/135/721/donation-l.png") no-repeat $theme_color;
}

.twitch-follow .background {
    background: url("https://uploads.twitchalerts.com/000/070/135/721/heart-l.png") no-repeat $theme_color;
}

.tag {
    position: absolute;
    top: 3px;
    right: 5px;
    font-size: 12px;
    line-height: 12px;
    color: $text_color;
    font-family: "$font_family";
}

@-webkit-keyframes grow {
    from {
        width: 0;
    }
    to {
        width: 200px;
    }
}

@keyframes grow {
    from {
        width: 0;
    }
    to {
        width: 200px;
    }
}

@-webkit-keyframes icon {
    0% {
        left: -20px;
        opacity: 0;
    }
    40% {
        left: 0;
        opacity: 1;
    }
    60% {
        left: 2px;
        opacity: 1;
    }
    100% {
        left: 0;
        opacity: 1;
    }
}

@keyframes icon {
    0% {
        left: -20px;
        opacity: 0;
    }
    40% {
        left: 0;
        opacity: 1;
    }
    60% {
        left: 2px;
        opacity: 1;
    }
    100% {
        left: 0;
        opacity: 1;
    }
}

@-webkit-keyframes info {
    0% {
        left: 2px;
        opacity: 0;
        text-indent: 0;
    }
    40% {
        left: 4px;
        opacity: 1;
        text-indent: 0;
    }
    60% {
        left: 0;
        opacity: 1;
        text-indent: 10px;
    }
    100% {
        left: 0;
        opacity: 1;
        text-indent: 0;
    }
}

@keyframes info {
    0% {
        left: 2px;
        opacity: 0;
        text-indent: 0;
    }
    40% {
        left: 4px;
        opacity: 1;
        text-indent: 0;
    }
    60% {
        left: 0;
        opacity: 1;
        text-indent: 10px;
    }
    100% {
        left: 0;
        opacity: 1;
        text-indent: 0;
    }
}